a) \(15^3\cdot5\cdot15^4\cdot3\)

\(=15^3\cdot15^4\cdot\left(5\cdot3\right)\)

\(=15^3\cdot15^4\cdot15\)

\(=15^{4+3+1}\)

\(=15^8\)

b) \(243:3^3\)

\(=3^5:3^3\)

\(=3^{5-3}\)

\(=3^2\)

10 000 = 104; 1 000 000 000 = 109

Ta có: (-8).(-3)3.(+125)

= (-2)3 . (-3)3 . 53

= [(-2).(-3)]3.53 = 63 . 53

= (6.5)3 = 303

Ta có: 27.(-2)3.(-7).(+49)

= 33 . (-2)3 . (-7) . (-7)2

= 33 . (-2)3 . (-7)3 = [3 . (-2) . (-7)]3 = 423

(Lưu ý: 49 = (-7)) . (-7) = (-7)2

=(35²)².5²:49²

=1225².5²:49²

=(1225.5:49)²

=125²

  35⁴.25:49²

=(352)2.52:492

=12252.52:492

=(1225.5:49)2

=1252

Ta có:

35⁴.25:49²

= (35²)².5²:49²

= 1225².5²:49²

= (1225.5:49)²

= 125²

Hk tốt!

Have a nice day === HAND!!

cùng một cơ số*

\(6^{15}\cdot6^2=6^{17}\\ 3^{14}\cdot2^{14}=\left(3\cdot2\right)^{14}=6^{14}\\ 2^{11}\cdot6^3\cdot3^{11}=\left(2\cdot3\right)^{11}\cdot6^3=6^{11}\cdot6^3=6^{14}\\ 6^2\cdot6^7=6^{13}\\ \left(6^3\right)^4=6^{3\cdot4}=6^{12}\\ 6^{2^3}=6^8\)

a) 7^{12 :} 7⁴ = 7^{12 - 4} = 7⁸.

b) x⁶ : x³ = x^{6 - 3} = x³.

c) a⁴ : a⁴ = a^{4 - 4} = a⁰ = 1.

\(A=8^2\cdot32^4\\ =2^6\cdot2^{20}\\ =2^{26}\\ B=27^3\cdot9^4\cdot243\\ =3^9\cdot3^{12}\cdot3^5\\ =3^{26}\)

`A=8^2*32^4=(2^3)^2*(2^5)^4=2^6*2^20=2^26`

`B=27^3*9^4*243=(3^3)^3*(3^2)^4*3^5=3^9*3^8*3^5=3^22`

\(A=8^2.32^4\)

\(=\left(2^3\right)^2.\left(2^5\right)^4\)

\(=2^6.2^{20}\)

\(=2^{26}\)

\(B=27^3.9^4.243\)

\(=\left(3^3\right)^3.\left(3^2\right)^4.3^5\)

\(=3^9.3^8.3^5\)

\(=3^{22}\)