Tìm x,biết :(x+1)+(x+2)+(x+3)+...+(x+1000)=5750
Tìm x thuộc N biết
( x + 1 ) + ( x + 2) + ( x + 3 ) + .... + ( x + 1000 ) = 5750
Tìm X biết (X+1)+(X+2)+(x+3)+........+(x+1000)=5750
Tim x thuoc Z: (x+1)+(x+2)+(x+3)+...+(x+40)=1000
2^x = 128
3^x+1 = 81
( x - 2 )^3 = 1000
(x+1)+(x+2)+(x+3).........(x+1000)
😣😣😣😣😣😣
Tìm x thuộc z : 1/3+1/6+1/10+...+2/x(x+1)=499/1000
a)(1/2+1)x(1/3+1)x(1/4+1)x...x(1/999+1)
b)(1/2-1)x(1/3-1)x(1/4-1)x...x(1/1000-1)
c)3/22 x 8/32 x 15/42 x .... x 99/102
help me please
tính nhanh
A = 1 x 2 x3 + 2 x 3 x 4 + ..... + 99 x 100 x 101
B = 1 x 2 + 2 x 3 + 3 x 4 +.......+ 999 x 1000
C = 1 + 4 + 9 + 16 + 25 + 36 + ....+ 10000
D = 1 + 2^2 + 3^2+ 4^2+ 5^2 + ... + 99^2