`(6^{4}.15^{3})/(8.9^{3}.10^{3})=((3.2)^{4}.(3.5)^{3})/(2^{3}.(3^{2})^{3}.(2.5)^{3})`
`=(3^{4}.2^{4}.3^{3}.5^{3})/(2^{3}.3^{2.3}.2^{3}.5^{3})`
`=(3^{4+3}.2^{4}.5^{3})/(2^{3+3}.3^{6}.5^{3})`
`=(3^{7}.2^{4}.5^{3})/(3^{6}.2^{6}.5^{3})`
`=(3)/(2^{2})=3/4`
Tinh:
\(\frac{-3}{5}.51\frac{11}{13}+\frac{3}{5}.21\frac{11}{13}\)
\(|\frac{-3}{4}|.|\frac{-2}{3}|\)
\(\frac{-3}{5}+5\frac{1}{13}-\frac{2}{3}+1\frac{3}{5}-\frac{11}{13}\)
\(\frac{3}{4}.\sqrt{16}-10.\sqrt{0,81}\)
\(\left(\frac{3}{4}\right)^3:\left(-\frac{3}{8}\right)^3\)
\(\frac{6^4.15^3}{8.9^3.10^3}\)
GIUP MK T ^ T
\(\left(-1,25\right).14,7.\left(-8\right)\)
\(\frac{3}{4}-1\frac{1}{6}\)
\(\frac{-3}{5}.51\frac{11}{13}+\frac{3}{5}.21\frac{11}{13}\)
\(|\frac{-3}{4}|.|-\frac{2}{3}|\)
\(\frac{-3}{5}+5\frac{1}{13}-\frac{2}{3}+1\frac{3}{5}-\frac{11}{33}\)
\(\frac{3}{4}.\sqrt{16}-10.\sqrt{0,81}\)
\(\left(\frac{3}{4}\right):\left(-\frac{3}{8}\right)\)
\(\frac{6^4.15^3}{8.9^3.10^3}\)
Tính giá trị biểu thức
\(\dfrac{2^8-2^3}{2^5-1}\)
\(\dfrac{4^8.9^4}{6^6.8^3}\)
\(\dfrac{27^4.2^3-3^{10}.4^3}{6^4.9^3}\)
\(\dfrac{2^4.2^6}{\left(2^5\right)^2}-\dfrac{2^5.15^3}{6^3.10^2}\)
\(\dfrac{8^{14}}{4^4.64^5}\)
\(\dfrac{9^{10}.27^7}{81^7.3^{15}}\)
\(\left(\dfrac{3}{10}\right)^4.\left(0,3\right)^5.\left(\dfrac{10}{3}\right)^{10}\)
\(\dfrac{\left(4^3\right)^2.9^4}{6^7.8^2}\)
\(\dfrac{4^8.9^4}{6^6.8^3}\)
\(3^6.\left(\dfrac{1}{3}\right)^6.81^2.\dfrac{1}{27^2}\) TÍNH
Tính
M = 7.8+8.9+9.10+...+19.20
CMR: \(\dfrac{1}{2^2}+\dfrac{1}{3^2}+...+\dfrac{1}{20^2}< 1\)
Thực hiện phép tính:
\(A=3.\dfrac{1}{1.2}-5.\dfrac{1}{2.3}+7.\dfrac{1}{3.4}-...+15.\dfrac{1}{7.8}-17.\dfrac{1}{8.9}\)
BT1: Thuc hien phep tinh
\(\left(-1,25\right).14,7.\left(-8\right)\)
\(\frac{3}{4}-1\frac{1}{6}\)
\(\frac{-3}{5}.51\frac{11}{13}+\frac{3}{5}.21\frac{11}{13}\)
\(\left[\frac{-3}{4}\right].\left[-\frac{2}{3}\right]\)
\(\frac{-3}{5}+5\frac{1}{13}-\frac{2}{3}+1\frac{3}{5}-\frac{11}{13}\)
\(\frac{3}{4}.\sqrt{16-10}.\sqrt{0,81}\)
\(\left(\frac{3}{4}\right)^3:\left(-\frac{3}{8}\right)^3\)
\(\frac{6^4.15^3}{8.9^3.10^3}\)
BT2: Tim x,y biet:
\(x-\frac{3}{5}=\frac{3}{5}\)
\(\left[x\right]-\frac{4}{5}=\frac{2}{5}\)
\(\frac{x}{-5}=\frac{24}{15}\)
\(\frac{x}{4}=\frac{y}{5}vax-y=21\)
Thực hiện phép tính ( tính nhanh nếu có thể)
\(\dfrac{20^4.15^5}{12^5.25^4}\)
1-3/2.10-3/4.15-3/6.20-3/8.25-...-3/1340.3355
