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x के सापेक्ष (4x^(3)-5x^(2)+1)^(4) का ...

x के सापेक्ष `(4x^(3)-5x^(2)+1)^(4)` का अवकलज ज्ञात कीजिए ।

लिखित उत्तर

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माना कि `y=u^(4)` , जहाँ `u=4x^(3)-5x^(2)+1`
अब `(dy)/(du)=4u^(3)` तथा `(du)/(dx)=12x^(2)-10x`
श्रंखला नियम से , `(dy)/(dx)=(dy)/(du)*(dy)/(dx)therefore(dy)/(dx)=4u^(3)(12x^(2)-10x)`
`=4(4x^(3)-5x^(2)+1)^(3)(12x^(2)-10x)`
Second method : माना कि `y=(4x^(3)-5x^(2)+1)^(4)`
`(dy)/(dx)=(d(4x^(3)-5x^(2)+1)^(4))/(d(4x^(3)-5x^(2)+1))*(d)/(dx)(4x^(3)-5x^(2)+1)`
`=(4x^(3)-5x^(2)+1)*(12x^(2)-10x+0)`
`=8(4x^(3)-5x^(2)+1)^(3)(6x^(2)-5x)`
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