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12-10-2017
Mathematics

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What is the value of k in the function f(x)=112-kx if f(-3)=122

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choixongdong choixongdong

12-10-2017

f(x) = 112 - kx
if f(-3) = 122
so
f(-3) = 112 - k(-3)
122 = 112 - (-3k)
122 = 112 + 3k
122 = 112 + 3k
so 3k = 122 - 112
3k = 10
k = 10/3
or
k = 3 1/3

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