Tính nhanh:(7/9+1)(7/20+1)(7/33+1)....(7/10800+1)
tinh nhanh A=(7/9+1)(7/20+1)(7/33+1).....(7/10800+1)
tính nhanh ;A=(7/9+1)(7/20+1)(7/33+1)....(7/10800+1)
Tính:
\(C=\left(\frac{7}{9}+1\right)\left(\frac{7}{20}+1\right)\left(\frac{7}{33}+1\right)...\left(\frac{7}{10800}+1\right)\)
Tính nhanh:
C=\(\left(\frac{7}{9}+1\right)\left(\frac{7}{20}+1\right)\left(\frac{7}{33}+1\right).......\left(\frac{7}{10800}+1\right)\)
tính nhanh A= \(\left(\frac{7}{9}+1\right).\left(\frac{7}{20}+1\right).\left(\frac{7}{33}+1\right)....\left(\frac{7}{10800}+1\right)\)
Tính nhanh:
C=( \(\frac{7}{9}\)+ 1)( \(\frac{7}{20}\)+ 1)( \(\frac{7}{33}\)+ 1).....( \(\frac{7}{10800}\)+ 1).
Tính nhanh
a) 4.11.3/4.9/121
b) 3/4.7/9+1/4.7/9
c) -6/7+2/11+12/17+9/11+-1/7
Câu 1 : 1.2+2.3+3.4+...+30.31
Câu 2 : 1.2.3+2.3.4+3.4.5+...+30.31.32
Câu 3 : 1/1.2+1/2.3+1/3.4+...+1/30.31
Câu 4 ; 1/1.3+1/3.5+...+1/99.101
Câu 5 : 1/1.4+1/4.7+...+1/91.94
Câu 6 : 1/1.2.3+1/2.3.4+1/3.4.5+...+1/31.32.33
Câu 7 : 1.1!+2.2!+3.3!+...+10.10!