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Question
If f(x) = 2{x} + 5x, where {x} is fractional part function of x, then find f(– 6)
Solution
f(x) = 2{x} + 5x
{– 6} = – 6 – [– 6]
= – 6 + 6
= 0
f(– 6) = 2{– 6} + 5(– 6)
= 2(0) – 30
= – 30
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