\(\frac{2}{1}+\frac{8}{1}=2+8=10\)
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\(\frac{1}{1×2}+\frac{1}{2×3}\: +\frac{1}{3×4}\: +\frac{1}{4×5}+\frac{1}{5×6}\: +\frac{1}{6×7}+\frac{1}{7×8}+\frac{1}{8×9}\: =?\)
\(\frac{1}{2}\times\frac{1}{5}+\frac{1}{5}\times\frac{1}{8}+\frac{1}{8}\times\frac{1}{11}+\frac{1}{11}\times\frac{1}{14}=?\)
Bài 1:Tính nhanh:
a,\(\frac{2}{3}+\frac{4}{6}+\frac{6}{3}\)
b,\(\frac{3}{4}+\frac{6}{8}+\frac{18}{12}\)
Bài 2:Tính:
a,\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\)
b,\(\frac{1}{2}+\frac{1}{3}+\frac{1}{5}+\frac{1}{7}\)
a.\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+......+\frac{1}{512}+\frac{1}{1024}\)
b.\(\frac{1}{8}+\frac{1}{48}+\frac{1}{80}+.....+\frac{1}{10200}\)
\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+.............+\frac{1}{256}\)
So sánh S với 2 biết :
\(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+\frac{1}{8}\)
a) frac{1}{2}+frac{1}{4}+frac{1}{8}+frac{1}{16}+frac{1}{32}+frac{1}{64} b) frac{1}{3}+frac{1}{9}+frac{1}{27}+frac{1}{81}+frac{1}{243}+frac{1}{729}c) frac{1}{5}+frac{1}{10}+frac{1}{20}+frac{1}{40}+...............+frac{1}{1280} d) frac{2}{3}+frac{2}{6}+frac{2}{12}+frac{2}{24}+frac{2}{48}+frac{2}{96}+frac{2}{192} e) 1+frac{5}{4}+frac{5}{8}+frac{5}{16}+frac{5}{32}+frac{5}{64} f) frac{3}{2}+frac{3}{8}+frac{3}{32}+frac{3}{128}+frac{3}{512}g) 3+frac{3}{5}+frac{3}{25}+fr...
Đọc tiếp
a) \(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}\) b) \(\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+\frac{1}{81}+\frac{1}{243}+\frac{1}{729}\)
c) \(\frac{1}{5}+\frac{1}{10}+\frac{1}{20}+\frac{1}{40}+...............+\frac{1}{1280}\) d) \(\frac{2}{3}+\frac{2}{6}+\frac{2}{12}+\frac{2}{24}+\frac{2}{48}+\frac{2}{96}+\frac{2}{192}\)
e) \(1+\frac{5}{4}+\frac{5}{8}+\frac{5}{16}+\frac{5}{32}+\frac{5}{64}\) f) \(\frac{3}{2}+\frac{3}{8}+\frac{3}{32}+\frac{3}{128}+\frac{3}{512}\)
g) \(3+\frac{3}{5}+\frac{3}{25}+\frac{3}{125}+\frac{3}{625}\)
Tính
\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}\)
tính nhanh
\(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+\frac{1}{8}\)
Tính nhanh:
\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}+\frac{1}{128}\)