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If u, v and w are functions of x, then s...

If u, v and w are functions of x, then show that `d/(dx)(udotvdotw)=(d u)/(dx)vdotw+udot(d v)/(dx)dotw+udotv(d w)/(dx)` in two ways - first by repeated application of product rule, second by logarithmic differentiation.

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RD SHARMA ENGLISH-DERIVATIVES-All Questions
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  14. Find the derivative of "sin x \ a t\ x"=0.

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  15. Let f be a real valued function defined by f(x)=x^2+1. Find f'(2).

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