The function f(x)= px+q such that f-1(6)=3 and f-1(-29)= -2. Find f-1(27).

Thanks.

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- Oct 27th 2009, 12:33 PMOasis1993Inverse functions
The function f(x)= px+q such that f-1(6)=3 and f-1(-29)= -2. Find f-1(27).

Thanks. - Oct 27th 2009, 01:04 PMe^(i*pi)
- Oct 27th 2009, 01:39 PMOasis1993
Could you please explain the steps to reach the answer

thanks. - Oct 27th 2009, 02:14 PMe^(i*pi)
...............(eq1)

.............(eq2)

Rearrange eq2 to make q the subject:

__Spoiler__:

.........................(eq 2.1)

**Sub the RHS of (eq 2.1) wherever***q*appears in (eq1):

**Sub the value of p into (eq2):**

**Test these values**

. This is correct

. This is correct

**Your equation now shows**

so you should be able to find by direct substitution.

__Spoiler__: - Oct 28th 2009, 08:14 AMOasis1993
Thank you very much for the help!

it helped alot!!!!!!!