1.

निम्नांकित फलन का द्वितीय अवकलज ज्ञात कीजिये| ` tan ^(-1) x ^(3)`

Answer» Correct Answer - ` (6x(1-2x^(6)))/( (1+x^(6))^(2))`
` y= tan ^(-1) x ^(3) rArr (dy)/(dx) =(1)/( { 1+(x^(3))^(2)} ) (3x^(2))=(3x ^(2) )/(1+ x^(6))`
` rArr(d)/(dx) ((dy)/(dx) )= (d^(2)y)/( dx^(2) )=3 *(d)/(dx) ((x^(2))/(1+x^(6)))`
` =3 [ ((1+x^(6) ) (d)/(dx) (x^(2))-x^(2) (d)/(dx) (1+ x^(6)))/((1+ x ^(6) )^(2))]`


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