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a: \(3\cdot3\cdot3\cdot3\cdot3=3^5\)
b: \(y\cdot y\cdot y\cdot y=y^4\)
\(a,2^5.8^4=2^5.2^{12}=2^{17}\)
\(b,25^6.125^3=5^{12}.5^9=5^{21}\)
\(c,625^5.25^7=5^{20}.5^{14}=5^{34}\)
\(d,12^3.3^3=\left(12.3\right)^3=36^3\)
a) 25 . 84 = 25 . (23)4 = 25 . 212 = 217
b) 256 . 1253 = (52)6 . (53)3 = 512 . 59 = 521
c) 6255 : 257 = (252)5 : 257 = 2510 : 257 = 253
d) 123 . 33 = (12 . 3)3 = 363
Trả lời:
\(a)\)\(2^5.8^4=2^5.\left(2^3\right)^4=2^5.2^{12}=2^{5+12}=2^{17}\)
\(b)\)\(25^6.125^3=\left(5^2\right)^6.\left(5^3\right)^3=5^{12}.5^9=5^{12+9}=5^{21}\)
\(c)\)Chưa rõ đề.
\(d)\)\(12^3.3^3=\left(12.3\right)^3=36^3\)
l) 27^8=(33)8=324
=>278:322=324:322
=324-22=32
m) 8^4=(23)4=212
45=(22)5=210
=>84:45=212:210
=212-10=22
a) \(27^8:3^{22}\)
\(=\left(3^3\right)^8:3^{22}\)
\(=3^{24}:3^{22}=3^{24-22}\)
\(=3^2\)
b) \(8^4:4^5\)
\(=\left(2^3\right)^4:\left(2^2\right)^5\)
\(=2^{12}:2^{10}=2^{12-10}=2^2\)
a, \(=7.7.5.5.5^2=7^2.5^4\)
b, \(=2.3.2.3.3.2^2=3^3.2^4\)
c, \(=5^4\)
xin tiick
\(a,4\cdot9=36=6^2\)
\(b,1000\cdot10=10000=100^2\)
\(c,5^3\cdot5=5^4\)
Trả lời :
a) 4 = 22 9 = 32
b) 1000 . 10 . 10 = 103 . 102 = 105
c) 53 . 5 = 54
~~Học tốt~~
a) \(9^3\cdot3^2\)
\(=\left(3^2\right)^3\cdot3^2\)
\(=3^6\cdot3^2\)
\(=3^8\)
b) \(x^7\cdot x:x^4\)
\(=x^8:x^4\)
\(=x^4\)
c) \(7\cdot3^9+3^{10}+51\cdot3^8\)
\(=3^8\cdot\left(7\cdot3+3^2+51\right)\)
\(=3^8\cdot81\)
\(=3^8\cdot3^4\)
\(=3^{12}\)
d) \(5^{15}\cdot125^3\cdot625\)
\(=5^{15}\cdot5^9\cdot5^4\)
\(=5^{28}\)
25.84=25.(23)4=25.212=217
256.1253=(52)6.(53)3=512.59=517
6255:257=(54)5:(52)7=520:214=56
Bạn làm sai rồi
25^6.125^3=5^21