Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(a.3^3\times18-3^3\times15=3^3\times\left(18-15\right)=3^3\times3^1=3^{3-1}=3^2\)
Mình chỉ làm được con \(a\)thôi. Đợi xíu rồi mình làm b,c . t.ick cho mình đi nhé
a, 33.18 - 32.15 = 32.( 3.18 - 15 ) = 32.39 = 32.3.13 = 33.13
b, 33.32 + 2.81 = 35 + 2.34 = 34.(3 + 2) = 34.5
~Hok tốt~
!_!_!
a) $3^8:3^6=3^{8-6}=3^2$
$19^7:19^3=19^{7-3}=19^4$
$2^{10}:8^3=2^{10}:(2^3)^3=2^{10}:2^9=2^{10-9}=2^1$
$12^7:6^7=(12:6)^7=2^7$
$27^5:81^3=(3^3)^5:(3^4)^3=3^{15}:3^{12}=3^{15-12}=3^3$
b) $10^6:10=10^{6-1}=10^5$
$5^8:25^2=5^8:(5^2)^2=5^8:5^4=5^{8-4}=5^4$
$4^9:64^2=4^9:(4^3)^2=4^9:4^6=4^{9-6}=4^3$
$2^25:32^4=2^{25}:(2^5)^4=2^{25}:2^{20}=2^{25-20}=2^5$
$18^3:9^3=(18:9)^3=2^3$
\(\cdot3^8:3^6=3^{8-6}=3^2\)
\(\cdot19^7:19^3=19^{7-3}=19^4\)
\(\cdot2^{10}:8^3=2^{10}:\left(2^3\right)^3=2^{10}:2^9=2\)
\(\cdot12^7:6^7=\left(12:6\right)^7=2^7\)
\(\cdot27^5:81^3=\left(3^3\right)^5:\left(3^4\right)^3=3^{15}:3^{12}=3^3\)
\(\cdot10^6:10=10^{6-1}=10^5\)
\(\cdot5^8:25^2=5^8:\left(5^2\right)^2=5^8:5^4=5^4\)
\(\cdot4^9:64^2=4^9:\left(4^3\right)^2=4^9:4^6=4^3\)
\(2^{25}:32^4=2^{25}:\left(2^5\right)^4=2^{25}:2^{20}=2^5\)
\(18^3:9^3=\left(18:9\right)^3=2^3\)
a)(3^3)5:3^2=3^15:3^2=3^13
b)(9.2)^3:9^3=9^3.2^3:9^3=9^3:9^3.2^3=1.2^3=2^3
a,62010:610.63
=62000.63
=62003
b,(38.316):(37.314)
=324:321
=33
c,(226:210):(218:216)
=216:22
=214
d,253:125
=(52)3:(53)
=56:53
=53
k mik nha
1) 279 : 81 = (33)9 : 34 = 327 : 34 = 323
2) a) = 170.3 + 154 : 14 = 510 + 11 = 521
b) = 136.(25 + 75) - 72 = 13600 - 49 = 13 551
c) = (2.5)3 - [(7.2)3 - 25.(64: 8 + 121 : 121 - 2.2)] = 1000 - [2744 - 25.(8 + 1 - 4)] = 1000 - 2619 = 1619
\(6^3.2^2.3\)
\(=6^3.2.2.3\)
\(=6^3.6.2\)
\(=6^4.2\)
Mk chỉ làm được thế thôi
a) \(2^5\cdot8^4\\ =2^5\cdot\left(2^3\right)^4\\ =2^5\cdot2^{12}\\ =2^{17}\)
b) \(25^6\cdot125^3\\ =\left(5^2\right)^6\cdot\left(5^3\right)^3\\ =5^{12}\cdot5^9\\ =5^{21}\)
c) \(625^3:25^7\\ =\left(5^4\right)^3:\left(5^2\right)^7\\ =5^{12}:5^{14}\\ =5^{-2}=\frac{1}{5^2}\)
d) \(4^{10}\cdot2^{30}\\ =\left(2^2\right)^{10}\cdot2^{30}\\ =2^{20}\cdot2^{30}\\= 2^{50}\)
e) \(9^{25}\cdot27^4\cdot81^3\\ =\left(3^2\right)^{25}\cdot\left(3^3\right)^4\cdot\left(3^4\right)^3\\ =3^{50}\cdot3^{12}\cdot3^{12}\\ =3^{74}\)
\(3^3.\left(18-1\right)\)
\(=3^3.17=27.17=459\)
\(b,3^6.3^2+2.\left(3^4\right)^2\)
\(=3^8+2.3^8\)
\(=3^8.\left(1+2\right)=3^8.3=3^9\)
a, \(3^3.18-3^3\)
\(=3^3.\left(18-1\right)\)
\(=3^3.17\)
b, \(3^6.3^2+2.81^2\)
\(=3^8+2.\left(3^4\right)^2\)
\(=3^8+2.3^8\)
\(=3^8.\left(1+2\right)\)
\(=3^8.3\)
\(=3^9\)