Question

True or false: The range of f(x)=log(x+2) is y is greater than or equal to 0

Answer 1

This is false. If f(x) = -1, then


f(x)=log(x+2)

-1=log(x+2)

10^(-1) = x+2

0.1 = x+2

0.1 - 2 = x

-1.9 = x

x = -1.9

So because f(-1.9) = -1, we know that f(x) = -1 is indeed in the range.


So that proves that the range is NOT y >= 0

Answer 2

Thank you! =)

Answer 3

you're welcome