Question

Rút gọn phân số

​​\(\frac{3^{10}.\left(-5\right)^{21}}{\left(-5\right)^{20}.3^{12}}\)

Giải cho đầy đủ nha, ai nhanh nhất mk tick cho^^

Answer 1

\(\frac{3^{10}.\left(-5\right)^{21}}{\left(-5\right)^{20}.3^{12}}=\frac{1.\left(-5\right)}{1.3^2}=-\frac{5}{9}\)

Chúc bạn học tốt

Giari thích :

 \(3^{12}:3^{10}=3^{12-10}=3^2=9\)

\(\left(-5\right)^{21}:\left(-5\right)^{20}=\left(-5\right)^{21-20}=\left(-5\right)^1=\left(-5\right)\)

Answer 2

\(\frac{3^{10}.\left(-5\right)^{21}}{\left(-5\right)^{20}.3^{12}}\)

\(=\frac{\left(-5\right)}{3^2}\)

\(=\frac{-5}{9}\)

OK

Answer 3

_{\(\frac{1}{3^2}.\frac{\left(-5\right)}{1}=\frac{-5}{9}\)}

Answer 4

\(\frac{3^{10}.\left(-5\right)^{21}}{\left(-5\right)^{20}.3^{12}}\)

\(=\frac{3^{10}.\left(-5\right)^{20}.\left(-5\right)}{\left(-5\right)^{20}.3^{10}.3^2}\)

\(=\frac{-5}{3^2}\)

\(=\frac{-5}{9}\)

(Nhớ k cho mình với nhoa!)

Answer 5

310.(−5)21(−5)20.312 =1.(−5)1.32 =−59 

Chúc bạn học tốt

Giari thích :

 312:310=312−10=32=9

(−5)21:(−5)20=(−5)21−20=(−5)1=(−5)