Các câu hỏi tương tự
Tính:A=1/7.12+1/12.17+1/17.22+...+1/52.57
B=10/8.13+10/13.18+10/18.23+...+10/253.258
tính:
B= 10/7.12+10/12.17+10/17.22+.......+10/502.507
K=10/7.12+10/12.17+10/17.22+...+10/502.507
Ai nhanh mk tik
Tính : \(N=2015+\frac{10}{2.7}+\frac{10}{7.12}+\frac{10}{12.17}+\frac{10.}{17.22}\)
tính nhanh :
C = \(\frac{10}{7.12}+\frac{10}{12.17}+\frac{10}{17.22}+....+\frac{10}{502.507}\)
Tính nhanh:a) Afrac{3}{5.8}+ frac{3}{8.11}+ frac{3}{11.14}+ ... + frac{3}{2006.2009}b) Bfrac{1}{6.10}+ frac{1}{10.14}+ frac{1}{14.18}+...+ frac{1}{402.406}c) Cfrac{10}{7.12}+frac{10}{12.17}+frac{10}{17.22}+...+frac{10}{502.507}d) Dfrac{4}{8.13}+frac{4}{13.18}+frac{4}{18.23}+...+frac{4}{253.258}
Đọc tiếp
Tính nhanh:
a) \(A=\frac{3}{5.8}\)+ \(\frac{3}{8.11}\)+ \(\frac{3}{11.14}\)+ ... + \(\frac{3}{2006.2009}\)
b) \(B=\frac{1}{6.10}\)+ \(\frac{1}{10.14}\)+ \(\frac{1}{14.18}\)+...+ \(\frac{1}{402.406}\)
c) \(C=\frac{10}{7.12}\)+\(\frac{10}{12.17}\)+\(\frac{10}{17.22}\)+...+\(\frac{10}{502.507}\)
d) \(D=\frac{4}{8.13}\)+\(\frac{4}{13.18}\)+\(\frac{4}{18.23}\)+...+\(\frac{4}{253.258}\)
Tính
a) A= 1/2.9 + 1/9.7 + 1/7.19 +....+ 1/252.509
b) B= 1/10.9 + 1/18.13 + 1/26.17+.... + 1/802.405
Nhanh nhaaa iuuu
tính A=\(\frac{1}{6.10}+\frac{1}{10.14}+\frac{1}{14.18}+...+\frac{1}{402.406}\)
55/2.7+55/7.12+55/12.17+55/12.17+55/17.22=?[dấu chấm là nhân]