Question

bài 1 :

a) 10^6*10^2:1000^3

b)625^2*57*3125:25

Bài 2:

a) (x-5)^5=(x-5)^10

Answer 1

Bài 1:

a) \(\dfrac{10^6\times10^2}{1000^3}=\dfrac{10^{6+2}}{\left(10^3\right)^3}=\dfrac{10^8}{10^9}=\dfrac{1}{10}\)

b)\(\dfrac{625^2\times57\times3125}{25}=\dfrac{\left(5^4\right)^2\times5^5\times57}{5^2}=\dfrac{5^{13}\times57}{5^2}=5^{11}\times57\)

Bài 2 :

a) (x - 5)⁵ = (x - 5)¹⁰

⇒ x - 5 = 0 hoặc x - 5 = 1

⇒ x ∈ {5 ; 6}