Question

Thu  gọn biểu thức sau :

11. 9¹¹ . 3⁷ - 9¹⁵ / ( 2 .3¹⁴)²

Answer 1

x=1;

x=1;

x=1.

k cho mình nhé.

Answer 2

dễ

\(\frac{11.9^{11}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)

= \(\frac{11.\left(3^2\right)^{11}.3^7-\left(3^2\right)^{15}}{2^2.3^{28}}\)

= \(\frac{11.3^{22}.3^7-3^{30}}{4.3^{28}}\)

= \(\frac{11.3^{29}-3^{29}.3}{4.3^{28}}\)

= \(\frac{\left(11-3\right).3^{29}}{4.3^{28}}\)

= \(\frac{8.3^{29}}{4.3^{28}}\)

= 2 . 3

= 6