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B
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C
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D
none of these
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Solution
The correct option is A Hereu(x)=x2+2x,v(x)=3x−4Usingquotientrule,dydx=(3x−4)d(x2+2x)dx−(x2+2x)d(3x−4)dx(3x−4)2=(3x−4)(2x+2)−(x2+2x)3(3x−4)2=3x2−8x−8(3x−4)2