Question

f(x)= [2x,x<1
[5,x=1
[x^2, x>1
which of the following are true?
A) f(5)=1
B) f(2) =4
C) f(-2)=4
f(1)=5

Answer 1

B & D

Answer 2

If x=5
5>1, so x>1
f(x)=x^2
f(5)=5^2=25
So A is not correct

Answer 3

When x=2
2>1, so x>1
f(x)=x^2
f(2)=2^2=4
So B is correct

Answer 4

When x=-2
-2<1
x<1
So f(x)=2x
f(-2)=2*(-2)=-4
So C is not correct

Answer 5

Try yourself the rest 1

Answer 6

Response plz