Sunday, 9 November 2025

If x/a = y/b = z/c , then prove that (x^3/a^3)+(y^3/b^3)+(z^3/c^3) = (3xyz)/(abc). [icse 2016]



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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)!