1.
a) \(\left(\frac{1}{5}\right)^3.10^3\)
\(=\left(\frac{1}{5}.10\right)^3\)
\(=2^3\)
\(=8.\)
b) \(\left(-\frac{2}{5}\right)^4:2^4\)
\(=\left[\left(-\frac{2}{5}\right):2\right]^4\)
\(=\left(-\frac{1}{5}\right)^4\)
\(=\frac{1}{625}.\)
c) \(32^2:4^3\)
\(=\left(2^5\right)^2:\left(2^2\right)^3\)
\(=2^{10}:2^6\)
\(=2^4\)
\(=16.\)
d) \(\left(\frac{2}{3}\right)^4:9^2\)
\(=\left(\frac{2}{3}\right)^4:\left(3^2\right)^2\)
\(=\left(\frac{2}{3}\right)^4:3^4\)
\(=\left(\frac{2}{3}:3\right)^4\)
\(=\left(\frac{2}{9}\right)^4\)
\(=\frac{16}{6561}.\)
Chúc bạn học tốt!
Đúng 0
Bình luận (0)
