briannamartns05
briannamartns05
03-02-2015
Mathematics
contestada
Let f(x) = 7x - 13. Find f-1(x).
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04-02-2015
[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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