The function f satisfies f(sqrt x+1)=1/x. For all x is greater than or equal to -1, x is not equal to 0. What is f(2)?
I’ll assume that by sqrt x+1 you mean sqrt(x+1).
Set sqrt(x+1) = 2
x+1 = 4
x = 3
So f(2) = 1/3
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