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Answer : 17
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Known that
f(x) = 3x + 2
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Question
f(5) = ..?
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Way to do
#since the x inside (x) change into (5), then just change the x with (5)
f(x) = 3x + 2
f(5) = 3(5) + 2
f(5) = 15 + 2
f(5) = 17
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