1. Tính.
a) \(\left(\frac{2}{3}\right)^3\) b) \(\left(-2\frac{3}{4}\right)^2\) c) (0,6)\(^4\) d) \(\left(\frac{-1}{2}\right)^4\) e) \(\left(\frac{-1}{2}\right)^5\)
2. viết mỗi số \(\frac{81}{125}\) ; \(\frac{-8}{27}\) dưới dạng 1 lũy thừa.
b) viết các số: (0,36)\(^3\) : b) \(\left(-\frac{4}{11}\right)^2\) : c) (0,5)\(^4\) . 6\(^4\) : d) \(\left(\frac{2}{5}\right)^5.x=\left(\frac{2}{5}\right)^8\)
3. tìm x
a) x : \(\left(\frac{3}{4}\right)^3=\left(\frac{3}{4}\right)^2\) b) \(\left(\frac{2}{5}\right)^5.x=\left(\frac{2}{5}\right)^8\)
giúp mk nhé mai mk nộp bài tp r thanks
Câu 1:
a)\(\left(\frac{2}{3}\right)^2=\frac{4}{9}\) b)\(\left(-2\frac{3}{4}\right)^2=\left(-\frac{11}{4}\right)^2=\frac{121}{16}\)
c)\(\left(0,6\right)^4=\left(\frac{3}{5}\right)^4=\frac{81}{625}\) d)\(\left(-\frac{1}{2}\right)^4=\frac{1}{16}\)
e)\(\left(-\frac{1}{5}\right)^5=\frac{-1}{3125}\)
bn đăg từng bài thui nhé