Question

[Candy trang vu]

(x+1)+(x+2)+...+(x+100)=5+50

nhanh lên mik đang cần gấp

Answer 1

[Akai Haruma]

Lời giải:

$(x+1)+(x+2)+....+(x+100)=5+50$

$\underbrace{x+x+...+x}_{100}+(1+2+3+...+100)=55$

$100x+\frac{100(100+1)}{2}=55$

$100x+5050=55$

$100x=-4995$

$x=-49,95$

Answer 2

[Nguyễn Thị Thùy Trâm]

(x + 1) + (x + 2) + ... + (x + 100) = 5 + 50

(x + 1) + (x + 2) + ... + (x + 100) = 55

(x . 100) + (100 + 1) . 100 : 2 = 55

(x . 100) + 5050 = 55

x . 100 = 55 - 5050

x . 100 = -4995

x = (-4995) : 100

x = -49,95