Monday, 2 October 2023

If log(x²+y²)=2tan^-1(x/y), then show that dy/dx=(x+y)/(x-y). (cbse2019)







 

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If find x. 1/(9!) + 1/(10!) = x/(11!).

  Here n! is read as n factorial. It can be written as n(n-1)! or n(n-1)(n-1)!