Các câu hỏi tương tự
x+1+x-2+x+3+x-4+.........+x+99+x-100=4*7*200
2/3*x-(1/2-3/4+5/6-7/8+...+197/198-199/200)=1/51+1/52+1/53+...+1/99+1/100
Tìm x
1/Tìm x,biết:
a)x+(x+1)+(x+2)+(x+3)+...+(x+99)+(x+100)=5555
b)1+2+3+4+...+x=820
c)3(x+1)=9.27
d)x+2x+3x+...+99x+100x=15150
e)(x+1)+(x+2)+(x+3)+...+(x+100)=205550
f)3x+3x+1+3x+2=351
(x+1)+(x+2)+(x+3)+(x+4)+.....+(x+99)+(x+100)
(x+1)+(x+2)+(x+3)+(x+4)+.....+(x+99)+(x+100)
a ) 1 + 2 + 3 + 4 +.................+ 98 + 99
b ) 2 + 4 + 6 +.............+ 100
c ) 1 x 2 + 2 x 3 + ............+ 99 x 100
1/2 x -2/3 x 3/4 x -4/5 x 5/6 x -6/7 x ....x 99/100 = ?
G = 1 x 2 + 1 + 2 x 3 + 1 + 3 x 4 + 1 + ... + 99 x 100 + 1
x1+x2+x3+...x98+x99+x100=0 va x1+x2=x3+x4=...=x99+x100=x100+x1=1 hoi x1 la bao nhieu