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insens350 [35]
4 years ago
13

F(x) = x^ - 81. Find f-^ (x)

Mathematics
1 answer:
ratelena [41]4 years ago
4 0
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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