I have no clue. Can someone help? THANKS!
Ans. [spoiler]E[/spoiler]
f(x) problem
This topic has expert replies
Sorry for using x, y .. was a,b
For f(x)=-3x
a=2
b=3
f(a+b)=f(5)=-3*5
f(a)+f(b)=-3*2+-3*3=-15
Therefore E is the right answer
Does not work for any function were x is x^2, 1/x as not linear
Try
For f(x)=x^2
a=2
b=3
f(a+b)=f(5)=5^2=25
f(a)+f(b)=2^2+3^2=13
or
For f(x)=2/x
a=2
b=3
f(a+b)=f(5)=2/5
f(a)+f(b)=2/2+2/3
For f(x)=-3x
a=2
b=3
f(a+b)=f(5)=-3*5
f(a)+f(b)=-3*2+-3*3=-15
Therefore E is the right answer
Does not work for any function were x is x^2, 1/x as not linear
Try
For f(x)=x^2
a=2
b=3
f(a+b)=f(5)=5^2=25
f(a)+f(b)=2^2+3^2=13
or
For f(x)=2/x
a=2
b=3
f(a+b)=f(5)=2/5
f(a)+f(b)=2/2+2/3