Question

помогите решить пример...
4x*(2x^14)^5 :(2x^10)^7 при х=90

Answer 1

$\frac{4x(2x^{14})^{5}}{(2x^{10})^{7}} = \frac{4x(2^{5}x^{14*5})}{(2^{7}x^{10*7})} =\frac{4x^{1}(32x^{70})}{128x^{70}} = \frac{4*32x^{70+1}}{128x^{70}} =\frac{128x^{71}}{128x^{70}} =x^{71-70}=x \\ x=90 \\ \frac{4x(2x^{14})^{5}}{(2x^{10})^{7}} =x=90$