Question

Tìm x biết

(2x+1)+(2x+2)+........+(2x+2015)=0

Answer 1

bai toan nay kho qua

Answer 2

(2x + 1) + (2x + 2) + ... + (2x + 2015) = 0

=> 2x + 1 + 2x + 2 + ... + 2x + 2015 = 0

=> 2015 . 2x + (1 + 2 + ... + 2015) = 0

=> 4030x + (2015 + 1).2015 : 2 = 0

=> 4030x + 2031120 = 0

=> 4030x = -2031120

=> x = -504

Answer 3

dap an 

x=-504

Answer 4

Toàn siêu nhân.chào thua