Question

rút gọn:

Answer 1

giúp mk vs các bn ơi

Answer 2

a. \(\dfrac{x^5.y^3.x.y^4}{x^6.y^5}=\dfrac{x^6.y^7}{x^6.y^5}=\dfrac{y^7}{y^5}=y^2\)

b. \(\dfrac{a^5.b^6.c^7}{\left(a.b.c\right)^5}=\dfrac{a^5.b^6.c^7}{a^5.b^5.c^5}=\dfrac{b^6.c^7}{b^5.c^5}=b.c^2\)

Answer 3

\(a,\dfrac{x^5.y^3.x.y^4}{x^6.y^5}.\)

\(=\dfrac{x^5.x.y^3.y^4}{x^6.y^5}.\)

\(=\dfrac{x^6.y^7}{x^6.y^5}.\)

\(=\dfrac{y^7}{y^5}=y^7:y^5=y^{7-5}=y^2.\)

Vậy.....

\(b,\dfrac{a^5.b^6.c^7}{\left(a.b.c\right)^5}.\)

\(=\dfrac{a^5.b^6.c^7}{a^5.b^5.c^5}.\)

\(=\dfrac{1.b.c^2}{1.1.1}=1.b.c^2=b.c^2.\)

Vậy.....