\(\left(1+\frac{1}{2}\right)\left(1+\frac{1}{3}\right)\left(1+\frac{1}{4}\right)....\left(1+\frac{1}{99}\right)\)
\(=\frac{3}{2}.\frac{4}{3}.\frac{5}{4}....\frac{100}{99}\)
\(=\frac{3.4.5...100}{2.3.4...99}=\frac{100}{2}=50\)
\(\left(1+\frac{1}{2}\right)\left(1+\frac{1}{3}\right)\left(1+\frac{1}{4}\right)....\left(1+\frac{1}{99}\right)\)
\(=\frac{3}{2}.\frac{4}{3}.\frac{5}{4}....\frac{100}{99}\)
\(=\frac{3.4.5...100}{2.3.4...99}=\frac{100}{2}=50\)
a) Thực hiện phép tính
( 1 - 1/2 ) x ( 1 - 1/3 ) x ( 1 - 1/4 ) x ( 1 - 1/5 ) x ... x ( 1 - 1/99 )
b) Tìm X biết
( X +1/2 ) + ( X +1/6 ) + ( X +1/12 ) + ( X +1/20 ) + ... + ( X +1/90 ) = 99/10
1. Tính nhanh:
M = 1 x 1/2 + 1/2 x 1/3 + 1/3 x 1/4 +...+ 1/99 x 1/100
1. Tính nhanh:
M = 1 x 1/2 + 1/2 x 1/3 + 1/3 x 1/4 +...+ 1/99 x 1/100
cíu :))
(2+4+6+...+100) - (1+3+5+...+99) = ?
1 x 2 + 2 x 3 + 3 x 4 + ... + 99 x 100 = ?
3 x 4 + 4 x 5 + 5 x 6 + ... + 149 x 150 = ?
1 + (1 + 2) + ( 1 + 2 + 3) + (1 + 2 + 3 + 4) + ....... + (1 + 2 + 3 + ... + 99)
----------------------------------------------------------------------------------------------------------- ( gạch ngang phân số )
1 x 99 + 2.98 + 3.97 + ...... + 99 x 1
Tính :
( 1 - 1/2 ) x ( 1 - 1/3 ) x ( 1 - 1/4 ) x ... x ( 1 - 1/99 ) x ( 1 - 1/100 )
Tính ( 1 + 1/2) x ( 1 + 1/3) x ( 1 + 1/4) ... ( 1 + 1/99)
tính:(1+1/2)x(1+1/3)x(1+1/4)x.......x(1+1/98)x(1+1/99)
giúp tui đi các anh em thiện lành:(
Tính nhanh:
(1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/99)
tính nhanh 1 1/2 x 1 1/3 x 1 1/4 x 1 1/5 x ..... 1 1/99 × 1 1/100