Question

Làm tính chia:

a) (-15)⁵ : (-15)³

b) (\(\frac{5}{8}\))¹⁰ : (\(\frac{5}{8}\))³

c) x¹⁰ : x⁷

d) y⁵ : y⁴

e) (-xy²z)³ : (-xy²z)³.

Answer 1

\(a.\left(-15\right)^5:\left(-15\right)^3\)

\(=\left(-15\right)^{5-3}\)

\(=\left(-15\right)^2\)

\(b.\left(\frac{5}{8}\right)^{10}:\left(\frac{5}{8}\right)^3\)

\(=\left(\frac{5}{8}\right)^{10-3}\)

\(=\left(\frac{5}{8}\right)^7\)

\(c.x^{10}:x^7\)

\(=x^{10-7}\)

\(=x^3\)

\(d.y^5:y^4\)

\(=y^{5-4}\)

\(=y^1=y\)

\(e.\left(-x.y^2.z\right)^3:\left(-x.y^2.z\right)^3\)

\(=\left(-x.y^2.z\right)^{3-3}\)

\(=\left(-x.y^2.z\right)^0=1\)