\(a,=5^{40}\cdot5^{12}=5^{52}\\ b,=x^{7+4+3}=x^{14}\\ c,=\left(3\cdot4\right)^6=12^6\)
a) \(25^{20}.125^4=\left(5^2\right)^{20}.\left(5^3\right)^4=5^{40}.5^{12}=5^{40+12}=5^{52}\)
b) \(x^7.x^4.x^3=x^{7+4+3}=x^{14}\)
c) \(3^6.4^6=\left(3.4\right)^6=12^6\)
viết các tích sau dưới dạng 1 luỹ thừa:
a( 25^20 . 125^4 = (52)20 . (53)4 = 540 . 512 = 552
b( x^7 . x^4 . x^3 = x7+4+3 = x14
c( 3^6 . 4^6 = (3.4)6=126
??
\(a) 25 20 .125 4 = ( 5 2 ) 20 . ( 5 3 ) 4 = 5 40 .5 12 = 5 40 + 12 = 5 52 b) x 7 . x 4 . x 3 = x 7 + 4 + 3 = x 14 c) 3 6 .4 6 = ( 3.4 ) 6 = 12 6\)