Thread: Please help with inverse functions...

ｔｈｅｒｅ　ａｒｅ　ｔｗｏ　ｆｕｎｃｔｉｏｎｓ：
ｆ（ｘ）＝（１／８）ｘ－３　　　　ａｎｄ　　　ｇ（ｘ）＝ｘ＾３

ｈｏｗ　ｄｏ　ｙｏｕ　ｆｉｎｄ　ｆ＾－１（ｇ＾－１（１））？

Originally Posted by got_jane

ｔｈｅｒｅ　ａｒｅ　ｔｗｏ　ｆｕｎｃｔｉｏｎｓ：
ｆ（ｘ）＝（１／８）ｘ－３　　　　ａｎｄ　　　ｇ（ｘ）＝ｘ＾３

ｈｏｗ　ｄｏ　ｙｏｕ　ｆｉｎｄ　ｆ＾－１（ｇ＾－１（１））？

why don't you type with spaces?

to find , start with


switch x and y and solve for y. that will give you . do a similar thing to find .

can you continue?

Originally Posted by Jhevon

why don't you type with spaces?

to find , start with


switch x and y and solve for y. that will give you . do a similar thing to find .

can you continue?

and
and so , I get 11 as an answer, but I checked the back of the book the correct answer is supposed to be 32...I wonder what I'm doing wrong.

Originally Posted by got_jane

and
and so , I get 11 as an answer, but I checked the back of the book the correct answer is supposed to be 32...I wonder what I'm doing wrong.

your function for is wrong. it is

Originally Posted by Jhevon

your function for is wrong. it is

oh! I got it! thank you so much! i appreciate it!