Thread: loads of help on functions needed

ok need some help i just cant seem to do these few questions, and i've left it until the last minute as it has to be in tomorrow! aargh! thanks for the help x

1) find the inverse and state the domain f(x) = 1 - 2^x , x E R

Hello pop_91

Originally Posted by pop_91

ok need some help i just cant seem to do these few questions, and i've left it until the last minute as it has to be in tomorrow! aargh! thanks for the help x

1) find the inverse and state the domain f(x) = 1 - 2^x , x E R

Let

Then:

So the inverse function is:

I presume the question means the domain of the inverse function. The domain of is , so here ; i.e. the domain is

Grandad

thanks so much x