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1.y=1/(1+5x)^3 =(1+5x)^(-3) y'= -3(1+5x)^(-4)*(1+5x)' = -15(1+5x)^(-4) = -15/(1+5x)^4 2.y=ln(lnx) y'=(1/lnx)*(lnx)' =1/(x(lnx))
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