SOLUTION: f(x)=k(2+x), find the value of k if f^-1(-2)= -3
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Question 1021063
:
f(x)=k(2+x), find the value of k if f^-1(-2)= -3
Found 2 solutions by
josgarithmetic, robertb
:
Answer by
josgarithmetic(39617)
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Answer by
robertb(5830)
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If
, then it should be that f(-3) = -2 by a direct application of f on both sides.
==> f(-3) = k(2-3) = -k after substituting x = -3 into f(x) = k(2+x)
==> -k = -2
==>
.