Question

Решить пример со степенями

Answer 1

$\frac{b^3*\sqrt[5]{b^2} }{b^{\frac{6}{5} } *(b^{1,6})^2 } =\frac{b^3*b^{\frac{2}{5} } }{b^{\frac{6}{5} } *b^{3,2} } =\frac{b^{3+\frac{2}{5} } }{b^{\frac{6}{5} } *b^{\frac{16}{5} } } =\frac{b^{\frac{17}{5} } }{b^{\frac{6+16}{5}} } =\frac{b^{\frac{17}{5} } }{b^{\frac{22}{5}} } =b^{\frac{17-22}{5} }=b^{-\frac{5}{5}}=b^{-1}=\frac{1}{b}$

При b=5/7

$\frac{1}{b} =1:\frac{5}{7} =\frac{7}{7} *\frac{7}{5} =\frac{7}{5} =1,4$