Question

f(x)=[-3x,x<0]
[4,x=0]
[x^2,x>0]
Which statements are true?
f(4)=0
f(2)=4
f(3)=9
f(1)=-3

I thought they were all true?

Answer 1

for the first one

if x = 4 we are looking at thex^2 and 4^2 = 16

for the 3rd one

if x = 3 we are lookingat x^2 so 3^2 = 9

for the last one we are lookin at x^2 so 1^2 = 1

so the first, third, and fourth answers are wrong

Answer 2

what do we do when x = 2?

Answer 3

the third answer was right

Answer 4

o woops your right

Answer 5

do you see why 1 and 4 are wrong?

Answer 6

hm, not really :C

Answer 7

Oh, I'm thinking of it wrong ugh but now I got it, was carrying the answer before the comma to the x after the comma and not the = if that makes sense.