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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) $10^6:10=10^{6-1}=10^5$
$5^8:25^2=5^8:(5^2)^2=5^8:5^4=5^{8-4}=5^4$
$4^9:64^2=4^9:(4^3)^2=4^9:4^6=4^{9-6}=4^3$
$2^25:32^4=2^{25}:(2^5)^4=2^{25}:2^{20}=2^{25-20}=2^5$
$18^3:9^3=(18:9)^3=2^3$
\(\cdot3^8:3^6=3^{8-6}=3^2\)
\(\cdot19^7:19^3=19^{7-3}=19^4\)
\(\cdot2^{10}:8^3=2^{10}:\left(2^3\right)^3=2^{10}:2^9=2\)
\(\cdot12^7:6^7=\left(12:6\right)^7=2^7\)
\(\cdot27^5:81^3=\left(3^3\right)^5:\left(3^4\right)^3=3^{15}:3^{12}=3^3\)
\(\cdot10^6:10=10^{6-1}=10^5\)
\(\cdot5^8:25^2=5^8:\left(5^2\right)^2=5^8:5^4=5^4\)
\(\cdot4^9:64^2=4^9:\left(4^3\right)^2=4^9:4^6=4^3\)
\(2^{25}:32^4=2^{25}:\left(2^5\right)^4=2^{25}:2^{20}=2^5\)
\(18^3:9^3=\left(18:9\right)^3=2^3\)
\(3^3.\left(18-1\right)\)
\(=3^3.17=27.17=459\)
\(b,3^6.3^2+2.\left(3^4\right)^2\)
\(=3^8+2.3^8\)
\(=3^8.\left(1+2\right)=3^8.3=3^9\)
a, \(3^3.18-3^3\)
\(=3^3.\left(18-1\right)\)
\(=3^3.17\)
b, \(3^6.3^2+2.81^2\)
\(=3^8+2.\left(3^4\right)^2\)
\(=3^8+2.3^8\)
\(=3^8.\left(1+2\right)\)
\(=3^8.3\)
\(=3^9\)
a) = 53+4+1 = 58
b) = 65-4 = 6
c) = 32+3+4-7 = 32
d) = x4+2+1 = x7
e) = 812+10+3 = 825
1. \(5^3.5^4.5=5^{3+4+1}=5^8\)
2. \(6^5:\left(6^3.6\right)=6^5:\left(6^{3+1}\right)=6^5:6^4=6^{5-4}=6^1\)
3. \(\left(3^2.3^3.3^4\right):3^7=\left(3^{2+3+4}\right):3^7=3^9:3^7=3^{9-7}=3^2\)
4. \(x^4.x^2.x=x^{4+2+1}=x^7\)
5. \(\left(8^{12}.8^{10}\right).8^3=8^{12+10+3}=8^{25}\)
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
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~
!_!_!
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
a) 37:35= 32
b)46 :46= 40
C) a4 : a= a3
d) 98:32 =314
e) 85:23 = 212
f) 37:27 = 34
\(a,3^7:3^5=3^2\)
\(b,4^6:4^6=4^0\)
\(c,a^4:a=a^3\)
\(d,9^8:3^2=9^4\)
\(e,8^5:2^3=8^{-7}\)
\(f,3^7:27=3^4\)
Dễ kinh !
a) 315: 35 = 315-5 = 310
b) 46:64 = 212 : 24 : 34 = 28 : 34 = 44 : 34 = \(\left(\frac{4}{3}\right)^4\)
c) 98 : 32 = 98 : 9 = 97
a, \(3^{10}\)
b, \(\left(2.2\right)^6:\left(2.3\right)^4\)=\(2^6.2^6:2^4.3^4\) = \(2^{12}:2^4.3^4=2^8:3^4\)
c,\(\left(3.3\right)^8:3^2=3^8.3^8:3^2=3^6.3^8=3^{14}\)
\(a.3^3\times18-3^3\times15=3^3\times\left(18-15\right)=3^3\times3^1=3^{3-1}=3^2\)
Mình chỉ làm được con \(a\)thôi. Đợi xíu rồi mình làm b,c . t.ick cho mình đi nhé