Các câu hỏi tương tự
x + 2x + 3x + ... + 100x = 5250
Tìm x?
( x+1) + (x+3) + (x+5)+......+ (x+47)+(x+49) =700
AND
2x+4x+6x+8x+.....+98x+100x =5100
THANKS
4x-x = 2+13
3x+x = 1/4
x-0,5x = 4
x- 0,25x = 1
4x- 3/4x + 5 =
3x - x - 7 = 1+x
8x + 2x + 20 = 25- 2x
3 - 1/2x = x - 1
5x - x + 15 = x + 40
6 + x = 22/3 + 2 - x
x+2*x+3*x+4*x+...+100 *x=15150
x+2.x+3.x+4.x+...+100.x=15150
tìm x: x+x*2+x*3+...+x*100=15150
x+2x+3x+4x+5x=x+28
1.Tính giá trị biểu thức
a,2+4+8+16+...+1024
b,1x2+2x3+3x+4x5+... + 14x15
2.Tìm x
a, ( 1+x) + ( 2+x) + ( 4+x) + ( 7+x)+...+(22+x) = 77
b,X + 2 x X+3 x X+4 x+ ... + 100 x X = 15150
c,X x X + 1x1+2x2 + 3x3 + 4x4 + ... +20x20 = 2895
Biết -x - 2x - 3x - 4x - 5x = nx. Vậy n =