Question

Mă ajută cineva cu acest mic calcul?Cum se face?

Answer 1

$[(\frac{2}{5})^{4}+ (\frac{1}{2})^{4}]= \frac{2^{4} }{5^{4}}+\frac{1^{4} }{2^{4}}=\frac{16\cdot16+625}{625\cdot16} =\frac{256+625}{10000}= \frac{881}{10000}$