If f is a linear function such that f(x+2)-f(x)=6 find the value of f^-1(x+2)-f^-1(x)
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Originally Posted by vvc531 If f is a linear function such that f(x+2)-f(x)=6 find the value of f^-1(x+2)-f^-1(x) hi let the function be ax+b f(x+2)-f(x)=6 ax+2a+b-ax-b=6 2a=6 , a=3 so f(x)=3x-b Now , find their inverses , $\displaystyle f^{-1}(x)=\frac{x-b}{3}$ $\displaystyle f^{-1}(x+2)=\frac{x+2-b}{3}$ then do as the question asks .
I have already done the steps shown. Can someone show me the answer so I can verity whether mine is correct?
Originally Posted by vvc531 I have already done the steps shown. Can someone show me the answer so I can verity whether mine is correct? If you had said this in the first place then: 1. You would have got the help you needed a lot faster. 2. People wouldn't be wasting their time - unpaid - posting things you have already done. If you want verification of an answer, say what answer you got.
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