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Question

If y=5x(1−x)2/3+cos2(2x+1), find dydx.

A
53(1x)5/9(3x)2sin(4x+2)
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B
53(1x)5/9(3x)2sin(4x+2)
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C
43(1x)5/9(3x)2sin(4x+2)
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D
53(1x)5/9(3x)sin(4x+2)
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Solution

The correct option is A 53(1x)5/9(3x)2sin(4x+2)
Given, y=5x(1x)2/3+cos2(2x+1)

dydx=5.1(1x)2/3+5x.(23)(1x)2/31(1)+2cos(2x+1).{sin(2x+1)}.2.
=53(1x)5/9(3x)2sin(4x+2).

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