Laudgarmel
Laudgarmel
05-10-2017
Mathematics
contestada
F(x) = x^ - 81. Find f-^ (x)
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kritter1
kritter1
05-10-2017
Substitute f(x) with y.
y=x^2-81 (now switch the variables)
x=y^2-81 (solve for y)
x+81=y^2
Sqrt(x+81)=y
F^-1(x)=sqrt(81+x)
Hope I helped :)
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