Here is a problem that I solved but I don't really know what's the rule??
For the following functions is f(a+b)= f(a)+f(b) for all positive numbers a and b?
1) f(x)=x^2
2) f(x)=x+1
3) f(x)=square root of x
4) f(x)=2/x
5) f(x)= -3x
The answer is 5, what is the best way to solve this problem?
My second question is as follows:
If n is a positive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n?
10
11
12
13
14
The correct answer is 11.
Thank you so much for your help.
For the following functions is f(a+b)= f(a)+f(b) for all positive numbers a and b?
1) f(x)=x^2
2) f(x)=x+1
3) f(x)=square root of x
4) f(x)=2/x
5) f(x)= -3x
The answer is 5, what is the best way to solve this problem?
My second question is as follows:
If n is a positive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n?
10
11
12
13
14
The correct answer is 11.
Thank you so much for your help.
