Question

what are the non permissible for y=1\.5x-1 and y=1/x^2-1

Answer 1

Whenever the denominator of the function becomes zero, the function becomes undefined, since anything upon zero is undefined. Hence, the denominator should be unequal to zero.

So, for the first one,

0.5 x - 1 \(\neq\) 0
=> \(x \neq \frac{1}{0.5}\)

=> \(x \neq 2\)



Can you solve the second one now?

Answer 2

x=+-sqrt 1?