\(S=1+3+7+16+...+1023\)
\(1+1+1=3\)
\(3\cdot2+1=7\)
\(7\cdot2+1=15.\)
\(15\cdot2+1=31\)
\(31\cdot2+1=63\)
\(63\cdot2+1=127\)
\(127\cdot2+1=255\)
\(255\cdot2+1=511\)
\(511\cdot2+1=1023\)
\(Ta\) \(cộng\) \(tất\) \(cả\) \(với\) \(nhau:\)
\(S=2036.\)
1/2+3/4+7/8+....+511/512+1023/1024
[ 1/2 - 1 ] + [ 1 - 3 / 4] + [7 / 8 - 1 ] + ... + [1 - 1023 / 1024]
Tính:
a, \(\frac{\left(\frac{3}{10}-\frac{4}{15}-\frac{7}{20}\right).\frac{5}{19}}{\left(\frac{1}{14}+\frac{1}{7}-\frac{-3}{35}\right).\frac{-4}{3}}\)
b, \(\left(\frac{1}{2}-1\right)+\left(1-\frac{3}{4}\right)+\left(\frac{7}{8}-1\right)+...+\left(1-\frac{1023}{1024}\right)\)
giải chi tiết giúp mk nha
tối nay mk cần
\(\left(\frac{1}{2}-1\right)+\left(1-\frac{3}{4}\right)+\left(\frac{7}{8}-1\right)+...+\left(1-\frac{1023}{1024}\right)\)
\(\left(\frac{1}{2}-1\right)+\left(1-\frac{3}{4}\right)+\left(\frac{7}{8}-1\right)+...+\left(1-\frac{1023}{1024}\right)\)
\(\frac{5}{3}+\frac{5}{15}+\frac{5}{35}+.....+\frac{5}{899}-\frac{5}{1023}\)
C = \(\left(\frac{1}{2}-1\right)+\left(1-\frac{3}{4}\right)+\left(\frac{7}{8}-1\right)+......+\left(1-\frac{1023}{1024}\right)\) ) . tính c
cho S=1/2 mu 2+1/3 mu 2+....+1/15 mu 2 chứng minh rằng 7/16<S<14/15
tìm số tự nhiên x biết
1+2+2 mũ 3 +2 mũ 4+....+2 mũ x+1 =1023
