Question

Giúp mình với

Answer 1

= \(\dfrac{2.5.5^{21}-9.5^{21}}{\left(5^2\right)^{10}}:\dfrac{5\left(3.7.7^{14}-19.7^{14}\right)}{7.7^{15}+3.7^{15}}\)

= \(\dfrac{\left(10-9\right).5^{21}}{5^{20}}:\dfrac{5\left(21-19\right).7^{14}}{\left(7+3\right).7^{15}}\)

= \(\dfrac{5^{21}}{5^{20}}:\dfrac{5.2.7^{14}}{10.7^{15}}\)

= \(5:\dfrac{1}{7}\)

= 35

Answer 2

\(=\dfrac{5^{21}\cdot1}{5^{20}}:1=5\)