Ta có :
\(\left(\frac{3}{4}\right)^4.\left(\frac{4}{3}\right)^5\)
\(=\left(\frac{3}{4}\right)^4.\left(\frac{4}{3}\right)^4.\left(\frac{4}{3}\right)\)
\(=\left(\frac{3}{4}.\frac{4}{4}\right)^4.\left(\frac{4}{3}\right)\)
\(=\left(1\right)^4.\left(\frac{4}{3}\right)\)
\(=\frac{4}{3}\)
Tính :
A = \(\left(1-\frac{2}{3}+\frac{4}{3}\right)-\left(\frac{4}{5}-1\right)+\left(\frac{7}{5}+2\right)\)
B = \(\left(-3+\frac{3}{4}-\frac{1}{3}\right):\left(5+\frac{2}{5}-\frac{2}{3}\right)\)
C = \(\left(\frac{3}{5}-\frac{4}{5}\right).\left(\frac{2}{7}-\frac{3}{14}\right)-\left(\frac{5}{9}-\frac{7}{27}\right).\left(1-\frac{3}{5}\right)+\left(1-\frac{11}{12}\right).\left(1-\frac{11}{12}\right)\)
Tính giá trị của các biểu thức sau:
a) P= \(\left(-0,5-\frac{3}{5}\right):\left(-3\right)+\frac{1}{3}-\left(\frac{-1}{6}\right):\left(-2\right)\)
b) Q= \(\left(\frac{2}{25}-1,008\right):\frac{4}{7}:\left(3\frac{1}{4}-6\frac{5}{9}\right).2\frac{2}{17}\)
TỪ CÁI CHỖ \(3\frac{1}{4}\) ĐẾN \(2\frac{2}{17}\) LÀ CÓ DẤU NGOẶC VUÔNG NHÉ , GIÚP MK VS MK ĐANG CẦN RẤT GẤP
Tính :
\(a,\left(\frac{4}{9}+\frac{1}{3}\right)^2\)
\(b,\left(\frac{1}{2}-\frac{3}{5}\right)^3\)
\(c,\left(\frac{-1}{5}\right)^5.\left(\frac{-6}{5}\right)^4\)
\(d,\left(\frac{3}{4}\right)^3:\left(\frac{3}{4}\right)^2:\left(\frac{-2}{5}\right)^3\)
4) Tính giá trị biểu thức sau:
P = \(\left(-0,5-\frac{3}{5}\right):\left(-3\right)+\frac{1}{3}-\left(-\frac{1}{6}\right):\left(-2\right)\)
Q = \(\left(\frac{2}{25}-1,008\right):\frac{4}{7}:\left[\left(3\frac{1}{4}-6\frac{5}{9}\right).2\frac{2}{17}\right]\)
thực hiện phép tính : ( tính nhanh nếu có thể )
a) \(\left(\frac{11}{12}:\frac{33}{16}\right).\frac{3}{5}+\frac{7}{23}.\left[\left(\frac{-8}{6}+\frac{-45}{18}\right)\right]\)
b) \(\left(\frac{-2}{3}+\frac{3}{7}\right):\frac{4}{5}+\left(\frac{-1}{3}+\frac{4}{7}\right):\frac{4}{5}\)
c) \(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)
d) \(\frac{-3}{4}.\frac{12}{-5}.\frac{-25}{6}+\left(-2\right).\frac{-38}{21}.\frac{-7}{4}.\frac{-3}{8}\)
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
tính
a) \(3^{-2}.\left[\left(\frac{2}{3}\right)^{-4}\right].\left[\left(-1\frac{1}{2}\right)^{-3}\right]\)
b) \(\left[\left(0.02\right)^{-3}\right].10^{-4}.\left(\frac{4}{5}\right)^{-2}\)
c) \(\left[2^{-2}-\frac{3}{4}^{-4}.\left(\frac{-1}{2}^2\right)\right]:\left(10^{-1}+1\right)\)
Tính giá trị của các biểu thức:
a) \(-5,13:\left(5\frac{5}{28}-1\frac{8}{9}.1,25+1\frac{16}{63}\right)\)
b) \(\left(3\frac{1}{3}.1,9+19,5:4\frac{1}{3}\right).\left(\frac{62}{75}-\frac{4}{25}\right)\)
GIẢI ĐẦY ĐỦ GIÚP MK BÀI NÀY VS , MK CAANF RẤT GẤP!
Tính giá trị biểu thức \(A=1+\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+\frac{1}{4}+\left(1+2+3+4\right)+...+\frac{1}{16}+\left(1+2+3+...+16\right)\)
Giúp mk mn ơi
