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If f(x) = -2x+7 is 15, what is f^-1 (15)?

If f(x) = -2x+7 is 15, what is f^-1 (15)?
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If f(x) = -2x+7 is 15, what is f^-1 (15)?

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User ShirazITCo
by
8.2k points

1 Answer

1 vote

Answer:
f^(-1)(15)=-4

Explanation:


f^(-1)(15)=k \implies f(k)=15\\\\\therefore -2k+7=15\\\\\implies -2k=8\\\\\implies k=-4

answered
User Raees Iqbal
by
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