# Precalculus

posted by .

Give an example to show that the product of two one-to-one function is not necessarily a one-to-one function.

• Precalculus -

y=x
y=-x
y^2 = -x^2

• Precalculus -

Sorry I don't understand y^2=-x^2 ??
Shouldn't it be:(y)(y)=(x)(-x)
y^2 = -x ??

• Precalculus -

(x)(-x) = -x^2

## Similar Questions

1. ### asymptotes and discontinuity 2???

consider the function f(x) = 1/x - 1 for x not=0 and f(x) = 0 for x = 0. decide whether f(x) has a)one symptote and two discontinuities b)two asymptotes and two discontinuities c)two asymptotes and one discontinuity I'm not sure if …
2. ### Algebra-One to one function

Could you please check my answers and help me with one of them?
3. ### Math AP Calc

Label each statement TRUE or FALSE. a. The sum of two one-to-one functions is one-to-one. b. The product of two one-to-one functions is one-to-one. c. If f is a one-to-one function and k is a real number (constant), then the function …
4. ### Math

Label each statement TRUE or FALSE. a. The sum of two one-to-one functions is one-to-one. b. The product of two one-to-one functions is one-to-one. c. If f is a one-to-one function and k is a real number (constant), then the function …
5. ### Math, Still Need Help!

Label each statement TRUE or FALSE. a. The sum of two one-to-one functions is one-to-one. b. The product of two one-to-one functions is one-to-one. c. If f is a one-to-one function and k is a real number (constant), then the function …
6. ### precalculus

the function f(x)= square root sign 10x+20, x>=20/10 is a one to one function find its inverse