Question

If f(x) = x2 - 1, find f(3).

5

2

8

-2

@eSpeX

Answer 1

@jim_thompson5910

Answer 2

f(0)= 0^2 -1
f(1) = 1^2 -1
f(2) = 2^2-1

see the pattern?

Answer 3

Kind of, yes.

Answer 4

@mathslover ?

Answer 5

so the f(3) would be ?

Answer 6

ummm f(3)= 2^3 -1?

Answer 7

f(3) = x2 - 1
then solve

Answer 8

All you're doing is replacing x with 3

f(x) = x^2 - 1

f(3) = 3^2 - 1 ... replace each copy of 'x' with 3

f(3) = ???

Answer 9

is it : \(f(x) = x^2 - 1\) ?

Answer 10

f(3) =8?

Answer 11

yes

Answer 12

Thanks everyone!

Answer 13

Jim, has got the point correct. You just have to put x = 3 for \(f(3) \)

For example : \(f(x) = x^2 - 1\\
f(1) = 1^2 - 1 \\
f(2) = 2^2 - 1 \\
f(3) = ?\)