Thread: 81^x-2

Question is in topic.
You must express this in form 9^y
I managed to do 1/9^1-x, and got 9^x as my answer (not sure if that's right), but cannot do this question

EDIT: Also, how would you do 3^4x+6, still expressing the answer in the form 9^y?

Thanks!

Originally Posted by Danielisew

Question is in topic.
You must express this in form 9^y
I managed to do 1/9^1-x, and got 9^x as my answer (not sure if that's right), but cannot do this question

EDIT: Also, how would you do 3^4x+6, still expressing the answer in the form 9^y?

Thanks!

"Question is in topic." What topic?

Also: you need to use parenthesis.

For the first problem:


For the second problem:


Note that , so


and what does any of this have to do with ???

-Dan

Originally Posted by Danielisew

Question is in topic.
You must express this in form 9^y
I managed to do 1/9^1-x, and got 9^x as my answer (not sure if that's right), but cannot do this question

EDIT: Also, how would you do 3^4x+6, still expressing the answer in the form 9^y?

Thanks!

Try putting in the missing brackets to make your meaning clear.

RonL

For the first one notice that

So we get

Distribute and get