Bài 1 :
a) \(7\cdot7\cdot7\cdot7=7^4\)
\(3\cdot5\cdot15\cdot15=15\cdot15\cdot15=15^3\)
b) \(8^5\cdot2^3=\left(2\cdot4\right)^5\cdot2^3=2^5\cdot4^5\cdot2^3=2^5\cdot\left(2^2\right)^5\cdot2^3=2^5\cdot2^{10}\cdot2^3=2^{18}\)
\(a^3\cdot a^5=a^8\)
\(a\cdot a\cdot a\cdot b\cdot b=a^3\cdot b^2\)
c) \(4^6:4^6=1^6;3^5\cdot4^5=12^5\)
\(4^3\cdot4^6=4^9\)
\(3^{15}:3^5=3^{10}\)
bài nãy bj xóa mất nên mình lấy lại bài cũ nha
a) \(7\cdot7\cdot7\cdot7=7^4\) ; \(3\cdot5\cdot15\cdot15=15\cdot15\cdot15=15^3\)
b) \(a^3\cdot a^5=a^8\) ; \(a\cdot a\cdot a\cdot b\cdot b=a^3b^2\) ; \(8^5\cdot2^3=8^5\cdot8=8^6\)
c) \(4^3\cdot4^6=4^9\) ; \(3^{15}:3^5=3^{10}\) ; \(4^6:4^6=4^0=1\) ; \(3^5\cdot4^5=\left(3\cdot4\right)^5=12^5\)
a.7^4 15^3
b.a^8 a^3.b^2 8^6
c.4^9 3^10 1 12^5
