Question Number 131932 by kaivan.ahmadi last updated on 09/Feb/21
$${if}\:{x}=\mathrm{18}\:{and}\:{y}=\mathrm{17}\:{then}\:{find} \\ $$$$\left({x}+{y}\right)\left({x}^{\mathrm{2}} +{y}^{\mathrm{2}} \right)\left({x}^{\mathrm{4}} +{y}^{\mathrm{4}} \right)\left({x}^{\mathrm{8}} +{y}^{\mathrm{8}} \right) \\ $$
Answered by Dwaipayan Shikari last updated on 09/Feb/21
$$\frac{{x}^{\mathrm{16}} −{y}^{\mathrm{16}} }{{x}−{y}}=\mathrm{18}^{\mathrm{16}} −\mathrm{17}^{\mathrm{16}} \\ $$
Commented by kaivan.ahmadi last updated on 09/Feb/21
$${thank}\:{sir} \\ $$