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फलन ` y= log (sqrt ( x) +(1)/(sqrt(x)) ) , ` तब ` (dy)/(dx) ` का मान ज्ञात कीजिए| |
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Answer» `y=log (sqrt(x)+ (1)/(sqrt(3))),` माना ` sqrt(x) +(1)/(sqrt(x) ) =t ` ` " "therefore " "y= logt ` ` therefore " "(dy)/(dx) =(d)/(dt) log t (d)/(dx)(x^(1//2) + x^(-1//2) ` ` " "(1)/(t) [ (1)/(2)x^(-1//2)+(-(1)/(2) ) x^(-3//2) ] ` ` " "= (1)/(2t) [ (1)/(sqrt(x) ) -(1)/(xsqrt(x)) ] =(1)/(2((x+1)/(sqrt(x)))) [(x-1) /(xsqrt(x) )]` ` " "= ((x-1))/(2x(x+1)) ` |
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