tính hợp lí a) 8^16:4^12 b)90^2:15^2 c)(45^10.5^10):75^10

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Question

tính hợp lí
a) 8^16:4^12
b)90^2:15^2
c)(45^10.5^10):75^10

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Môn Toán Kiệt Gia 4 years 2020-11-09T03:16:10+00:00 2020-11-09T03:16:10+00:00 1 Answers 146 views 0

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Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

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mit · Answer 1 · 2020-11-09T03:17:30+00:00

mit

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2020-11-09T03:17:30+00:00 November 9, 2020 at 3:17 am

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Đáp án:

Giải thích các bước giải:

a) $8^{16} : 4^{12}$

= $2^{16} {.4}^{16} : 4^{12}$

= $2^{16} {.4}^{4}$

= $2^{16} {.2}^{8}$

b) $90^{2} : 15^{2}$

$= (90 : 15)^{2}$

$= 6^{2}$

$= 36$

c) $(45^{10} {.5}^{10}) : 75^{10}$

$= (45.5)^{10} : 75^{10}$

$= 225^{10} : 75^{10}$

$= 3^{10}$