Question

tính hợp lí:

a/ \(\frac{-13}{6}:\frac{25}{7}+\frac{7}{25}.\left(\frac{-17}{6}\right)\)

b/ \(\frac{-4^5.3^5}{2^4.6^4}+\left(2015\right)^0\)

Giải chi tiết cho mik nha! Cảm ơn

Answer 1

a. \(-\frac{13}{6}:\frac{25}{7}+\frac{7}{25}.\left(-\frac{17}{6}\right)\)

\(=-\frac{13}{6}.\frac{7}{25}+\frac{7}{25}.\left(-\frac{17}{6}\right)\)

\(=\frac{7}{25}.\left[\left(-\frac{13}{6}\right)+\left(-\frac{17}{6}\right)\right]\)

\(=\frac{7}{25}.\left(-\frac{30}{6}\right)\)

\(=-\frac{7}{5}\)

b. \(\frac{-4^5.3^5}{2^4.6^4}+2015^0=\frac{\left(-4.3\right)^5}{\left(2.6\right)^4}+1=\frac{-12^5}{12^4}+1=-12+1=-11\)

Answer 2

a) \(\frac{-13.7}{6.25}\)+ \(\frac{-7.17}{25.6}\)=\(\frac{-210}{210}\)=-1

b) \(\frac{-4^4.4.3^4.3}{2^4.3^4.2^4}\)=\(\frac{-2^4.2^4.4.3^4.3}{2^4.3^4.2^4}\)=-12