Hi everyone, Today I am just sharing a simple problem on 2nd order derivatives. What's important to note is that, we are proving an identity involving 2nd order derivatives. After differentiating with respect to x, we cross multiply and apply the product rule, instead of the quotient rule to calculate the 2nd order derivative. We can also use the quotient rule, to do this problem but as you will agree with me, math is all about making it easy and simple.
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