Description : How can two infinite sets not have one to one correspondence with each other?
Last Answer : You've missed what an infinite set means. Consider this definition: Infinite sets are the sets containing an uncountable or infinite number of elements. Infinite sets are also called uncountable sets. That is ... . Or for the set of all positive integers and the set of all negative integers .
Description : For what value of k , the following system of equations have infinite solutions : kx + 4y = k-4, 16x + ky = k (a) k = 2 (b) k = 4 (c) k = 6 (d) k = 8
Last Answer : (d) k = 8
Description : If somebody choose two digit and three digit numbers and their difference is 989.What will be their sum? a) 1000 b)1010 c) 1006?
Last Answer : None of the above. Let x be the three digit number and y be the two digit number. x - y =989. x = 989 + y. x is obviously greater than 989 and less than 1000 (since it is three digits). Since y is a two digit number ... 989 + 10 = 999. We can't go any higher, so x =999 and y=10. x+y = 999+10 = 1009
Description : So, I think my mind just broke. Why is the sum of all integers -1/12?
Last Answer : answer:The video lost me about 40 seconds in then he made this leap from 1+2+3+4… to 1+ x2 + 2x squared and so on. That may be obvious to a mathematician, but to me it was a giant leap of faith. And logically it doesn’t make sense either. So I am just as confused as you are.
Description : If 4! = 1x2x3x4 and is called 4 factorial, what is the sum of the numbers e.g. 4(?)= (1+2+3+4) called?
Last Answer : What’s wrong with the summation notation? It does just that. I don’t think there’s any other way of expressing it other than writing it out. [addition]: After more research, I found a formula where 1+2+3+4….+n= n*(n+1)/2 http://en.wikipedia.org/wiki/Triangular_number
Description : How many combinations with three different colored die can you make the sum 15?
Last Answer : 10. Try it for yourself and see.
Description : The sum or difference of of two irrational numbers is always (a) rational (b) irrational (c) rational or irrational (d) not determined
Last Answer : (b) irrational
Description : The sum of two irrational numbers is always (a) irrational (b) rational (c) rational or irrational (d) one
Last Answer : (a) irrational
Description : The sum of a rational and irrational number is (a) rational (b) irrational (c) both of above (d) none of above
Description : If α and β are the zeroes of the polynomial 5x 2 – 7x + 2, then sum of their reciprocals is: (a) 14/25 (b) 7/5 (c) 2/5 (d) 7/2
Last Answer : (d) 7/2
Description : Now it was Ravi‘s turn. He rolled the dice. What is the probability that he got the sum of the two numbers appearing on the top face of the dice is greater than 8? a. 1 b. 5/36 c. 1/18 d. 5/18
Last Answer : d. 5/18
Description : Rahul got next chance. What is the probability that he got the sum of the two numbers appearing on the top face of the dice is equal to 7? a. 5/9 b. 5/36 c. 1/6 d. 0
Last Answer : c. 1/6
Description : Now it was Ravi‘s turn. He rolled the dice. What is the probability that he got the sum of the two numbers appearing on the top face of the dice is less than or equal to 12? a. 1 b. 5/36 c. 1/18 d. 0
Last Answer : a. 1
Description : Rahul got next chance. What is the probability that he got the sum of the two numbers appearing on the top face of the dice is 13? a. 1 b. 5/36 c. 1/18 d. 0
Last Answer : d. 0
Description : Two dice are thrown together. Find the probability that the sum of the numbers obtained is even a. 1/4 b. 1/6 c. 1/3 d. 1/2
Last Answer : d. 1/2
Description : In the following figure ABCD is a cyclic quadrilateral, the sum of degree measures of ∠A and ∠D is: (SOURCE: Fig. 3.7, Exercise 3.7, Chapter 3, PAIR of LINEAR EQUATIONS in TWO VARIABLES, NCERT, Class X) (a) 120° (b) 180° (c) 230°(d) 250°
Last Answer : (c) 230°
Description : The square of a two digit number is divided by half the number. After 36 is added to the quotient, this sum is then divided by 2. The digits of the resulting number are the same as those in ... 's place of the original number is equal to twice the difference between its digits. What is the number?
Last Answer : Answer: 46
Description : Find the smallest number in a GP whose sum is 38 and product 1728? (a) 12 (b) 20 (c) 8 (d) none of these
Last Answer : (c) 8
Description : The sum of three consecutive integers is 36. What is the largest of the three integers? The correct answer is 13.?
Last Answer : The sum of three consecutive integers is 36. (x - 1) + x + (x + 1) = 36 13 is the largest of the three integers.
Description : Help on arithmetic series?
Last Answer : .
Description : What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12
Last Answer : Answer: 9
Description : The sum of the terms of an infinite geometric progression is denoted by `S=(a)/(1-r)`, change the subject as r.
Last Answer : The sum of the terms of an infinite geometric progression is denoted by `S=(a)/(1-r)`, change the subject as r.
Description : Is it possible to solve a magic square made up of a system of unknown symbols?
Last Answer : No. I could populate a 9×9 magic square with the letters A through I. You would never figure out what numbers were represented by the letters because a 9×9 magic square is not unique.
Description : Did we invent math,or did we discover it?
Last Answer : God invented it.
Description : How many of you can pass this simple test?
Last Answer : I can.
Description : Using the rays in the diagram, how many different acute angles can be formed?
Last Answer : We don’t do your homework, but this is a simple combinatorics problem. Any pair of those rays will form an acute angle. How many pairs are there?
Description : Can someone help me with my math assignment?
Last Answer : We don't do people's homework here, but we can help in other ways. For instance, some of us can suggest an approach. One would hope, though, that your instructor has already prepared you to ... you take your shot at answering the question, and then post your answer and ask if others will comment?
Description : What’s 0.222222222... as a simplified fraction?
Last Answer : 2/9
Description : What do you think of this YouTube video on why you can't divide by zero?
Last Answer : Also are the symbols for Eternity and infinity the same? ∞
Description : Have you ever forgotten something that you didn't think you ever COULD forget?
Last Answer : I still forget my neighbours name. I have known her for 3 years. I forgotten the quadric equation. I remember some math mnemonics but had to look up SOHCAHTOA and roy'g'biv to answer this question. I ... simple things every now and again , and have to look them up online , Fluther , or call family.
Description : How many miles will a person run during a 10 kilometer race?
Last Answer : What kind of mile? There are many.
Description : A magazine company conducted a phone survey asking subscribers to identify the brand of outdoor camping equipment they like best. Every subscriber was surveyed, and the results were printed in an article titled “Most Popular Equipment among All Campers.” Why is the title of the article misleading?
Last Answer : For view, of course. Edit: ok, now I confused. Are you asking what makes the title misleading, or why the magazine makes the misleading title?
Description : Is there a calculation in which infinities cancels out?
Last Answer : There are many asymptotic functions that are expressed as the x or y value approaches infinity. They are not at all uncommon. And the ratio of two such functions would define something like a line. Students of Analytic Geometry as well as Calculus are quite familiar with the occurrence of infinity.
Description : Why do polls say that they are accurate + - 3.00% of the time 19/20?
Last Answer : Maybe it should be + – 3.05%
Description : What do you think of this paper?
Last Answer : The Riemann Hypothesis is one of the most famous of all mathematical problems. If it had been proved it would be newsworthy and we would have heard about it. I am not a mathematician but this proof must be wrong. Scott Aaronson’s blog might be of some help.
Description : What FORMULA of "nth ROOT" ? How do to obtain it with just unique formula?
Last Answer : https://en.wikipedia.org/wiki/Nth_root_algorithm
Description : How can we derive the expression for cross product of two vectors?
Last Answer : Here is a video that shows where the term cross comes from. Two vectors in a 3D space when “multiplied” by each other result in a third vector that represents how they “cross” each other.
Description : What is the probability of getting two pinks balls?
Last Answer : Wow. There are two ways of solving this question. One way uses recursive probability theory and the other way uses an elegant guess. Wrong site for mathematics questions?
Description : To the nearest 10%, what percentage of all numbers contain a 9?
Last Answer : You probably need to clarify that you mean what percentage of the set of all integers contains the digit 9'? Because there are an infinite number of numbers that don't contain that digit (and ... is also an infinite set of digits that does not. Maybe you need to restrict your range some more.
Description : Hey guys, does anyone know the factored form of x3-2x2-x+2?
Last Answer : Welcome to Fluther. Two things: 1. We don't do homework problems or provide answers. If you ask a question of the how do I ? variety, we are much more accommodating. That's just how we roll. (And it ... in a way that'll help you to understand it or get credit for it. But the answer is out there.
Description : Will my final grade drop to a c?
Last Answer : Do the math.
Description : Does a Riemann like hypothesis exist for 10 dimensions?
Last Answer : The Riemann Hypothesis has to do with the distribution of prime numbers and has nothing to do with other dimensions as far as I know.
Description : It's that day again! How are you celebrating Π day?
Last Answer : I know it’s silly but I’m having a piece of pecan pie for dessert tonight. The pie is waiting on the kitchen counter.
Description : What does E = mc2 actually mean in mathmatical form?
Last Answer : I had the same question. How can anything go twice the speed of light? Anyway, I went hunting and researching and I finally understood the equation. But now I forgot. This is going to be good!
Description : What is the difference between one foot squared vs. 12 inches squared?
Last Answer : I don’t understand your question @RedDeerGuy1. A foot is 12 inches. One foot squared is 144 inches.
Description : Does Asia have its own mathematics?
Last Answer : No. Math is the same everywhere.
Description : How much is 5E38?
Last Answer : E is how the calculator expresses overflow by using exponential notation. In most calculators 5E38 would mean 5×10^38.
Description : Is zero an odd or even number?
Last Answer : I think technically it’s even as it’s a multiple of 2 and therefore shares all the traits of even numbers.
Description : What are the shape simplification methods for simplifying the irregular shape geometry as regular geometry?
Last Answer : Not sure if this is at all helpful to you, but from a 3d modelling standpoint, you could subdivide the shape into rectangles and triangles.