\(=\dfrac{5^{10}\cdot7^3-5^{10}\cdot7^4}{5^9\cdot7^3+5^9\cdot7^3\cdot2^3}\)
\(=\dfrac{5^{10}\cdot7^4\cdot\left(1-7\right)}{5^9\cdot7^3\cdot\left(1+2^3\right)}=\dfrac{5\cdot7\cdot\left(-6\right)}{9}=\dfrac{-2\cdot5\cdot7}{3}=\dfrac{-70}{3}\)
Thực hiện phép tính: \(\frac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
Thực hiện phép tính: \(\frac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
Tính :
c) C = \(\dfrac{2}{4.7}-\dfrac{3}{5.9}+\dfrac{2}{7.10}-\dfrac{3}{9.13}+...+\dfrac{2}{301.304}-\dfrac{3}{401.405}\)
d) D = \(\left(\dfrac{1}{4.9}+\dfrac{1}{9.14}+\dfrac{1}{14.19}+...+\dfrac{1}{44.49}\right).\left(\dfrac{1-3-5-7-...-49}{89}\right)\)
1. Tính :
a. \(\dfrac{9^6.9^{10}}{3^{32}}\) ; b. \(\dfrac{25^8.25^{10}}{5^{34}}\) ; c. \(\dfrac{7^{56}}{49^9.49^{20}}\) ; d. \(\dfrac{4^2.4^3}{2^{10}}\) ; e. \(\dfrac{2^{17}.25^5}{10^8.8^3}\) ; f. \(\dfrac{3^{15}.25^4}{15^6.8^3}\)
2. Tính lũy thừa âm :
a. 3-2 b. 2-3
3. Tính :
a. \(\dfrac{\left(0,8\right)^{17}}{\left(0,4\right)^3}\) ; b. \(\dfrac{\left(0,8\right)^3}{\left(0,4\right)^4}\) ; c. \(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
Giải giùm mk mấy câu này nha!!!!
Rút gọn biểu thức sau:
B=\(\dfrac{\left(\dfrac{2}{3}\right)^3\times\left(-\dfrac{3}{4}\right)^2\times\left(-1\right)^5}{\left(\dfrac{2}{5}\right)^2\times\left(-\dfrac{5}{12}\right)^3}\)
Tính
C=\(\dfrac{2^{12}\cdot3^5-4^6\cdot9^2}{\left(2^2\cdot3^6\right)^6+8^4\cdot3^5}-\dfrac{5^{10}\cdot7^3-25^5\cdot49^2}{\left(125\cdot7\right)^3+5^9\cdot14^3}\)
Bài 1:Tính giá trị biểu thức
\(_{1,}\)\(3^2.\dfrac{1}{243}.81^2.\dfrac{1}{3^3}\)
\(_{2,}\)(\(4.2^5\)):\(\left(2^3.\dfrac{1}{16}\right)\)
\(_{3,}\)\(\left(2^{-1}+3^{-1}\right)+\left(2^{-1}.2^0\right):2^3\)
\(_{4,}\)\(\left(-\dfrac{1}{3}\right)^{-1}-\left(-\dfrac{6}{7}\right)^0+\left(\dfrac{1}{2}\right)^2:2\)
\(_{5,}\)[(0,1)\(^2\)]\(^0\)+[(\(\dfrac{1}{7}\))\(^{-1}\)]\(^2\).\(\dfrac{1}{49}.\left[\left(2^2\right)^3:2^5\right]\)
Bài 2:Rút gọn biểu thức
a,\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
b,\(\dfrac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)
c,\(\left(\dfrac{2}{5}\right)^7.5^7+\left(\dfrac{9}{4}\right)^3:\left(\dfrac{3}{16}\right)^3\)
\(\overline{2^7.5^2+512}\)
d,\(\left(\dfrac{2}{3}\right)^3.\left(-\dfrac{3}{4}\right)^2.\left(-1\right)^5\)
\(\overline{\left(\dfrac{2}{5}\right)^2}.\left(-\dfrac{5}{12}\right)^3\)
Tính :
a) \(25^3:5^2\)
b) \(\left(\dfrac{3}{7}\right)^{21}:\left(\dfrac{9}{49}\right)^6\)
c) \(3-\left(-\dfrac{6}{7}\right)^0+\left(\dfrac{1}{2}\right)^2:2\)
Bài 1:Tính
a)\(\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2\) b)\(\left(\dfrac{3}{4}-\dfrac{5}{6}\right)^2\)c) \(\dfrac{5^4.20^4}{25^5.4^5}\)
Bài 2:Tìm x
a)\(\left(x-\dfrac{1}{5}\right)^{2004}+\left(y+0,4\right)^{100}+\left(z-3\right)^{678}=0\)
b)\(\left(x+5\right)^3=-64\) c)\(\left(2x-3\right)^2=9\)
c)\(x^2+1=82\)
Bài 3:Tính
M=\(\dfrac{8^{10}+4^{10}}{8^4+4^{11}}\)
Bài 4:So sánh \(2^{24}\)và\(3^{16}\)
GIÚP MIK DZỚI,MÌNH TIK CHO ><
