pls. sovle. the. differenciation. ques
 

Hi, second:y = tan-14x1-4x=tan-12×2x1-2x2let 2x= tan θ such that θ=  tan-12xputting all we get y = tan-12tanθ1-tan2θ= tan-1tan2θ= 2θ=2  tan-12xso dydx= 21+2x2×ddx2x=21+4x×22x=2x1+4x
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