[1-1/4]x[1-1/9]x[1-1/16]x.....x[1-1/100]x[1-1/121]
( 1 - 1/4 ) x ( 1 - 1/9 ) x ( 1 - 1/16 ) x ...... x ( 1 - 1/100 )
( 1 - 1/4 ) x ( 1 - 1/9 ) x ( 1- 1/16 ) x ............ x (1 - 1/100 ) x ( 1 - 1/121 ) = ?
[ 1-1/4 ] x [1-1/9 ]x [ 1- 1/16 ] x..........x [ 1-1/100 ] x [ 1- 1/121 ]
( 1 - 1/4 ) x ( 1 - 1/9 ) x ( 1 - 1/16 ) x ... x (1 - 1/100) x (1- 1/121) = ?
F = (1-1/4) x (1-1/9) x (1-1/16) x ......... x ( 1-1/100) = ?
Tính nhanh
a) B= 10/18 x 22/30 x 36/44 x ... x 200/209
b) C=(1- 1/4) x (1- 1/9) x (1-1/16) x (1- 1/100)
giải hộ nhé
1/2x3 + 1/3x4 + 1/4 x 5 + ...... + 1/a x ( a + 1 ) = 49/100
tính a
tính T =( 1 - 1/4 ) x ( 1 - 1/9 ) x ( 1 - 1/16) x ..... x (1 - 1/625)
ai nhanh đúng sẽ dc tick
