Câu hỏi của Giang Khánh Ly

Question

bài 8: a, 3^2 x 1/243 x 81^2 x 1/3^3

b, (4.2^5) : (2^3 x 1/16)

Phạm Tuấn Đạt · Accepted Answer

$8;a,3^2.\frac{1}{243}.81^2.\frac{1}{3^3}$

$=\frac{3^2.\left(3^4\right)^2}{243.3^3}$

$=\frac{3^2.3^8}{3^5.3^3}$

$=\frac{3^{10}}{3^8}=3^2=9$

$b,\frac{4.2^5}{2^3.\frac{1}{16}}$

$=\frac{2^2.2^5}{2^3.\frac{1}{2^4}}$

$=\frac{2^7}{\frac{1}{2}}=2^7.2=2^8$

Câu trả lời:

$8;a,3^2.\frac{1}{243}.81^2.\frac{1}{3^3}$

$=\frac{3^2.\left(3^4\right)^2}{243.3^3}$

$=\frac{3^2.3^8}{3^5.3^3}$

$=\frac{3^{10}}{3^8}=3^2=9$

$b,\frac{4.2^5}{2^3.\frac{1}{16}}$

$=\frac{2^2.2^5}{2^3.\frac{1}{2^4}}$

$=\frac{2^7}{\frac{1}{2}}=2^7.2=2^8$

Hoàng Ninh · Answer

a, $3^2.\frac{1}{243}.81^2.\frac{1}{3}^3$

$=3^2.\frac{1}{243}.\left(3^4\right)^2.\frac{1}{27}$

$=3^2.\frac{1}{243}.3^8.\frac{1}{27}$

$=\frac{3^2.3^8}{243.27}$

$=\frac{3^2.3^8}{3^5.3^3}$

$=\frac{3^{10}}{3^8}=3^2=9$

b, $\left(4.2^5\right):\left(2^3.\frac{1}{16}\right)$

$=\left(2^2.2^5\right):\left(8.\frac{1}{16}\right)$

$=2^7:\frac{1}{2}$

$=2^8$

Câu trả lời:

a, $3^2.\frac{1}{243}.81^2.\frac{1}{3}^3$

$=3^2.\frac{1}{243}.\left(3^4\right)^2.\frac{1}{27}$

$=3^2.\frac{1}{243}.3^8.\frac{1}{27}$

$=\frac{3^2.3^8}{243.27}$

$=\frac{3^2.3^8}{3^5.3^3}$

$=\frac{3^{10}}{3^8}=3^2=9$

b, $\left(4.2^5\right):\left(2^3.\frac{1}{16}\right)$

$=\left(2^2.2^5\right):\left(8.\frac{1}{16}\right)$

$=2^7:\frac{1}{2}$

$=2^8$