T=(1-1/4)*(1-1/9)*(1-1/16)*...*(1-1/576)*(1-1/625)
giúp mik nhanh nhé!!!
T= (1-1/4)+(1-1/9)+(1-1/16)+.......+(1-1/576)+(1-1/625)
Nhanh lên, mình cần gấp cách giải
trả lời giúp mình
13/25 nhé
tinh t=(1-1/4)*(1-1/9)*(1-1/16)*...*(1-1/576)*(1-1/625)
\(\left(1-\frac{1}{4}\right)x\left(1-\frac{1}{9}\right)x\left(1-\frac{1}{16}\right)x...x\left(1-\frac{1}{576}\right)x\left(1-\frac{1}{625}\right)\)
\(=\frac{3}{4}x\frac{8}{9}x\frac{15}{16}x...x\frac{575}{576}x\frac{624}{625}=\frac{1x3}{1x4}x\frac{2x4}{3x3}x\frac{3x5}{4x4}x...x\frac{23x25}{24x24}x\frac{24x26}{25x25}\)
\(=\left(\frac{1}{1}x\frac{2}{3}x\frac{3}{4}x\frac{4}{5}x...x\frac{23}{24}x\frac{24}{25}=\frac{1x2x3x4x...x23x24}{1x3x4x5x...x24x25}=\frac{2}{25}\right)\left(\frac{3}{5}x\frac{4}{3}x\frac{5}{4}x\frac{6}{5}x...x\frac{25}{24}x\frac{26}{25}=\frac{3x4x5x6x...x25x26}{5x3x4x5x...x24x25}=\frac{26}{5}\right)\)
\(\frac{2}{25}x\frac{26}{5}=\frac{52}{50}=\frac{26}{25}\)
nguyễn như đạt sai rồi kết quả phải là 13/25 mk làm rùi
tính: T=(1-1/4)*(1-1/9)*(1-/16)*...*(1-1/576)*(1-1/625)
0,52 nhé
tk cho mk nha
T=(1-1/4)x(1-1/9)x(1-1/16)x....x91-1/576)x(1-1/625)
T=(1-1/4)x(1-1/9)x(1-1/16)x....x91-1/576)x(1-1/625)
Đây là toán lớp 5 hay lớp 6 vậy.
Nếu đây là toán 6 thì tớ giải cho.
T = ( 1 - 1/4 ) x ( 1- 1/9 ) x ( 1 - 1/16 ) x ...x ( 1- 1/576 ) x ( 1 - 1/625 )
=3/4x 8/9x 15/16x ...x575/576x624/625 =(3/2x2)x(8/3x3)x(15/4x4)x...x(575/24x24)x(624/25x25) =1x3x2x4x3x5x...x23x25x24x26/2x3x4x...25x2x3x4x...x25 =1x2x3x4x...x24x3x4x...x26/2x3x4x...x25x2x3x4x...x25 =1x26/2x25=26/50=13/15=0.52
Tính : T = ( 1 - 1/4)x(1 - 1/9)x(1 - 1/16) x ...x (1-1/576)x(1 - 1/625)
(1 - 1/4)(1 - 1/9)(1 - 1/16) *...(1- 1 576 )*(1- 1 625 )