Question

Which function is an odd function?

f(x) = 5x2

f(x) = 3x – 1


f(x) = 0.7x2 + 3

f(x) = 0.8x3

Answer 1

last one ?

Answer 2

It is an even function if f(-x) = f(x), it is an odd function if f(-x) = - f(x)

Answer 3

That's one way to test it!

Answer 4

isnt odd functions mostly cubic?

Answer 5

Correct

Answer 6

im guessing its the last one

Answer 7

You can think of this for example, say we're given \[(-2)^3 = (-2)(-2)(-2) = -8\]

Answer 8

Notice how it's still negative

Answer 9

Hope that helps!