briannamartns05 briannamartns05

03-02-2015
Mathematics

Answered

Let f(x) = 7x - 13. Find f-1(x).

Answer :

03-02-2015

[tex]f(x)=7x-13 \\ \\ y=7x-13 \ \ \ |+13 \\ y+13=7x \ \ \ |\div 7 \\ x=\frac{1}{7}y+\frac{13}{7} \\ \\ \boxed{f^{-1}(x)=\frac{1}{7}x+\frac{13}{7}}[/tex]

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