Các câu hỏi tương tự
Tính các tổng sau:
a) \(\frac{1}{7}+\frac{1}{7^2}+\frac{1}{7^3}+...+\frac{1}{7^{100}}.\)
b) \(-\frac{4}{5}+\frac{4}{5^2}-\frac{4}{5^3}+...+\frac{4}{5^{200}}.\)
c)\(\frac{-1}{3}+\frac{1}{3^2}-\frac{1}{3^3}+...+\frac{1}{3^{100}}-\frac{1}{3^{101}}\)
Tính
A = \(\frac{1}{7}+\frac{1}{7^2}+\frac{1}{7^3}+...+\frac{1}{7^{100}}\)
B = \(\frac{4}{5}+\frac{4}{5^2}-\frac{4}{5^3}+...+\frac{4}{5^{200}}\)
tim so doi cua cac tong sau:
\(\frac{3}{5}+\frac{-1}{3};\frac{-2}{13}+\frac{-11}{26};-2+\frac{-5}{8}\)
\(2+\frac{-3}{4};\frac{13}{3}+\frac{5}{3};\frac{-1}{3}+\frac{7}{3};\frac{-7}{2}+\frac{-3}{4}\)
Tính các tổng sau
\(A=7-7^4+7^7-...+7^{301}\)
\(B=\frac{1}{7}+\frac{1}{7^2}+\frac{1}{7^3}+...+\frac{1}{7^{100}}\)
\(C=\frac{4}{5}+\frac{4}{5^2}-\frac{4}{5^3}+...+\frac{4}{5^{200}}\)
AI TÍNH ĐƯỢC MÌNH CHO 10 TICK NHA
tinh hop li :
\(\frac{\left(\frac{1}{5}-\frac{2}{7}\right)\cdot\frac{3}{4}-\frac{3}{4}\cdot\left(\frac{1}{3}-\frac{2}{7}\right)}{\frac{1}{5}\cdot\frac{2}{7}-\frac{1}{3}\cdot\left(\frac{2}{7}+\frac{3}{9}\right)+\frac{3}{9}+\frac{1}{5}}\)
cham la nhan nha cac ban
ai nhanh mk tick cho
tính :
A = \(\frac{\frac{3}{7}-\frac{3}{17}+\frac{3}{37}}{\frac{5}{7}-\frac{5}{17}+\frac{5}{37}}\)+\(\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}}{\frac{7}{5}-\frac{7}{4}+\frac{7}{3}-\frac{7}{2}}\)
\(\frac{1}{2}-\frac{2}{3}+\frac{3}{4}-\frac{4}{5}-\left(\frac{-5}{6}\right)-\frac{6}{7}-\frac{-7}{8}+\frac{6}{7}-\frac{5}{6}+\frac{4}{5}-\frac{3}{4}+\frac{2}{3}-\frac{1}{2}\)
Thực hiện phép tính hợp lí nếu có thể:a/ frac{6}{7}+frac{1}{7}cdotfrac{2}{7}+frac{1}{7}cdotfrac{5}{7}b/frac{2}{3}cdotfrac{5}{7}cdotfrac{-3}{8}cdotfrac{11}{5}c/11frac{4}{7}-left(2frac{3}{5}+5frac{4}{7}right)d/frac{3}{4}-frac{3}{4}cdotleft(frac{2}{3}+1right)e/0.5cdot1frac{1}{3}cdot75%:frac{2}{5}+frac{3}{5}f/frac{6}{7}+frac{5}{8}:5-frac{3}{16}cdotleft(-2right)^2g/1frac{3}{8}+left(frac{-5}{6}+frac{7}{12}right):frac{2}{3}h/1frac{1}{4}cdotfrac{-3}{2}+50%cdot98i/left(2,09:1,1+4,5right)cdotfrac{5}{8}+4,...
Đọc tiếp
Thực hiện phép tính hợp lí nếu có thể:
a/ \(\frac{6}{7}+\frac{1}{7}\cdot\frac{2}{7}+\frac{1}{7}\cdot\frac{5}{7}\)
b/\(\frac{2}{3}\cdot\frac{5}{7}\cdot\frac{-3}{8}\cdot\frac{11}{5}\)
c/\(11\frac{4}{7}-\left(2\frac{3}{5}+5\frac{4}{7}\right)\)
d/\(\frac{3}{4}-\frac{3}{4}\cdot\left(\frac{2}{3}+1\right)\)
e/\(0.5\cdot1\frac{1}{3}\cdot75\%:\frac{2}{5}+\frac{3}{5}\)
f/\(\frac{6}{7}+\frac{5}{8}:5-\frac{3}{16}\cdot\left(-2\right)^2\)
g/\(1\frac{3}{8}+\left(\frac{-5}{6}+\frac{7}{12}\right):\frac{2}{3}\)
h/\(1\frac{1}{4}\cdot\frac{-3}{2}+50\%\cdot98\)
i/\(\left(2,09:1,1+4,5\right)\cdot\frac{5}{8}+4,32\)
left(frac{3}{8}+frac{-3}{4}+frac{7}{12}right):frac{5}{6}+frac{1}{2}frac{1}{2}+frac{3}{4}-left(frac{3}{4}-frac{4}{5}right)6frac{5}{12}:2frac{3}{4}+11frac{1}{4}left(frac{1}{3}-frac{1}{5}right)left(frac{7}{8}-frac{3}{4}right)1frac{1}{3}-frac{2}{7}left(3,5right)^2left(frac{3}{5}+0,415-frac{3}{200}right)2frac{2}{3}.0,25Thực hiện các phép tínhcảm ơn
Đọc tiếp
\(\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)
\(\frac{1}{2}+\frac{3}{4}-\left(\frac{3}{4}-\frac{4}{5}\right)\)
\(6\frac{5}{12}:2\frac{3}{4}+11\frac{1}{4}\left(\frac{1}{3}-\frac{1}{5}\right)\)
\(\left(\frac{7}{8}-\frac{3}{4}\right)1\frac{1}{3}-\frac{2}{7}\left(3,5\right)^2\)
\(\left(\frac{3}{5}+0,415-\frac{3}{200}\right)2\frac{2}{3}.0,25\)
Thực hiện các phép tính
cảm ơn