Các câu hỏi tương tự
Rút gọn:
\(A=\frac{\frac{2}{7}+\frac{2}{5}+\frac{2}{17}-\frac{2}{293}}{\frac{3}{7}+\frac{3}{5}+\frac{3}{17}+\frac{3}{293}}\)
C= \(\frac{\frac{2}{7}+\frac{2}{5}+\frac{2}{17}-\frac{2}{293}}{\frac{3}{7}+\frac{3}{5}+\frac{3}{17}-\frac{3}{293}}\)
Tính:
F=\(\frac{\frac{2}{7}+\frac{2}{5}+\frac{2}{17}-\frac{2}{293}}{\frac{3}{7}-\frac{3}{293}+\frac{3}{17}+\frac{3}{5}}\)
Tìm x, biết rằng:
\(\frac{\frac{2}{7}+x+\frac{2}{17}-\frac{2}{293}}{\frac{3}{7}+\frac{3}{5}+\frac{3}{17}-\frac{3}{293}}-\frac{2}{3}=0\)
bài 1. tính
a, (1-1/4).(1-1/9)...(1-1/10000)
b, 3/4.8/9...9999/10000
c, 3-1/5+3/10/2+1/4-3/5
d, 2/3+2/5+2/17-2/293/3/7+3/5+3/17-3/293
1. Tính :
a.\(\frac{\frac{2}{7}+\frac{2}{5}+\frac{2}{17}+\frac{2}{293}}{\frac{3}{7}+\frac{3}{5}+\frac{3}{17}+\frac{3}{293}}+\frac{\frac{7}{12}+\frac{5}{6}-1}{5-\frac{3}{4}+\frac{1}{3}}\)
b.\(\left(1-\frac{1}{7}\right)\times\left(1-\frac{2}{7}\right)\times\left(1-\frac{3}{7}\right)\times......\times\left(1-\frac{10}{7}\right)\)
Tính:
a) \(A=\frac{\frac{7}{8}+\frac{7}{27}-\frac{7}{49}}{\frac{11}{8}+\frac{11}{27}-\frac{11}{49}}\)
b)\(B=\frac{\frac{8}{9}-\frac{8}{27}-\frac{8}{81}+\frac{8}{243}}{4-\frac{4}{3}-\frac{4}{9}+\frac{4}{27}}\)
c)\(C=\frac{\frac{2}{7}+\frac{2}{5}+\frac{2}{17}-\frac{2}{293}}{\frac{3}{7}+\frac{3}{5}+\frac{3}{17}-\frac{3}{293}}\)
rút gọn biểu thức
M= {[2/7+2/5+2/17-2/239_3/7+3/5+3/17-3/239}:{7/12+5/6-1_5-3/4+1/3}]
rút gọn
rút gọn biểu thức M = [ {2/7 + 2/5 + 2/17 - 2/239 _ 3/7 + 3/5 + 3/17 - 3/239 } : { 7/12 + 5/6 - 1 _ 5 - 3/4 + 1/3} ] . 27/11
chú thích :
/ : là gạch p/s nha
còn dấu _ : là tất cả trên