how (1,2) is stritly decreasing?

Asked by Srishti Singhal | 19th Mar, 2013, 09:27: PM

Expert Answer:

You take any point in the interval (1, 2), say 1.5
Then, 
dy/dx = 4(1.5)(-0.5)(0.5) < 0
Hence, the function is decreasing in (1, 2).

Answered by  | 19th Mar, 2013, 10:22: PM

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