Bài 1: Rút gọn rồi quy đồng
\(\frac{4\cdot5+4\cdot11}{8\cdot7-4\cdot3}\) \(\frac{-15\cdot8+10\cdot7}{5\cdot6+20\cdot3}\)và \(\frac{2^4\cdot5^2\cdot7}{2^3\cdot5\cdot7^3\cdot11}\)
a, Rút gọn phân số :
\(\frac{\left(-2\right)^3\cdot3^3\cdot5^3\cdot7\cdot8}{3\cdot5^3\cdot2^4\cdot42}\)
b, so sánh không qua quy đồng :
A=\(\frac{-7}{10^{2005}}\)+\(\frac{-15}{10^{2006}}\)
B=\(\frac{-15}{10^{2005}}\)+\(\frac{-7}{10^{2006}}\)
\(\frac{2^5\cdot7+2^5}{2^5\cdot2^5-2^5\cdot3}\)và \(\frac{3^4\cdot5\cdot< -3>^6}{3^4\cdot13\cdot3^4}\)
Quy Đồng gium mk nha.truoc 2 h voi help help
1.Rút gọn(nếu cần) rồi so sánh
\(\frac{\left(-5\right)^2-5\cdot3^2}{5^3+5^2\cdot3^2}\) ;\(\frac{4^6\cdot9^5+6^9\cdot120}{8^4\cdot3^{12}-6^{11}}\) và\(\frac{2929-101}{2\cdot1919+404}\)
Rút gọn phân số sau : \(\frac{2^3\cdot3^3\cdot5^3\cdot7\cdot8}{3\cdot2^4\cdot5^3\cdot14}\)
Ai xong trước và đúng mình tích cho
Rút gọn :\(\frac{2\cdot3\cdot5+4\cdot9\cdot25+6\cdot9\cdot35+10\cdot21\cdot40}{2\cdot3\cdot5+4\cdot9\cdot35+6\cdot9\cdot49+10\cdot21\cdot56}\)
Rút gọn biểu thức:
\(A=\frac{2^2}{1\cdot3}\cdot\frac{3^2}{2\cdot4}\cdot\frac{4^2}{3\cdot5}......\frac{99^2}{98\cdot100}\)
Rút gọn:
a,\(A=\frac{5\cdot4^{15}\cdot9^9-4\cdot3^{20}\cdot8^9}{5\cdot2^9\cdot6^{19}-7\cdot2^{29}\cdot27^6}\)
b,\(B=\left(1+\frac{1}{1\cdot3}\right)\left(1+\frac{1}{2\cdot4}\right)\left(1+\frac{1}{3\cdot5}\right)...\left(1+\frac{1}{2014\cdot2016}\right)\)
CMR: \(\frac{3}{1\cdot2\cdot3}+\frac{5}{2\cdot3\cdot4}+\frac{7}{3\cdot4\cdot5}+...+\frac{2017}{1008\cdot1009\cdot1010}< \frac{5}{4}\)
