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Question

The maximum value of f(x)=100|45x| is

A
100
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B
145
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C
55
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D
45
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Solution

The correct option is C 100
f(x)={145xif x>4555+xif x<45
f(x)={1x>451x<45
f(x) is maximum at x=45
f(45)=100

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