Question

(x+1)+(x+2)+......+(x+100) = 5750

m.n ơi làm hộ mình nha cảm ơn mọi  người nhìu nhìu

Answer 1

(x + 1) + (x + 2) +......+ (x + 100) = 5750

(x + x + ... + x) + (1 + 2 + 3 + ... + 100) = 5750

x . 100 + (1 + 2 + 3 + ... + 100) = 5750

x . 100 + ([1 + 100] . 100 : 2) = 5750

x . 100 + 5050 = 5750

x . 100 = 5750 - 5050

x . 100 = 700

=> x = 700 : 100 = 7

Answer 2

100x=5750-(1+2+3+...+100) => x=0,7

Answer 3

nhầm x=7

Answer 4

\(\left(X+1\right)+\left(X+2\right)+\left(X+3\right)+...+\left(X+100\right)\)

\(=\left(X+X+...+x\right)+\left(1+2+3+4+...+100\right)\)

\(Xx100+\left(1+100x100:2\right)\)

\(Xx100+5050=5750\)

\(Xx100=5750-5050\)

\(Xx100=700\)

          \(X=700:100\)

         \(X=7\)

\(Ai\)\(k\)\(minh,minh\)\(k\)\(lai!\)

Answer 5

(x + 1) + (x + 2) + ... + (x + 100)      = 5750

(x + x + ... + x) + (1 + 2 + ... + 100) = 5750

100x + [(1+100) × 100 : 2]               = 5750

100x + 5050 = 5750

100x              = 5750 - 5050

100x              = 700

       x              = 700 : 100

       x              = 7.