Question

Tìm x

( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ... + ( x + 50 ) = 1375

Answer 1

<= >(x+x+....+x) + (1+2+3+4+5+......+50) = 1375

<=> 50x + 50 . (50+1) : 2 = 1375

<=> 50x + 1275 = 1375

<=> 1375 - 1275 = 50x

<=> 50x = 100

<=> x= 100 : 50

x = 2

Answer 2

(X+1)+(X+2)+(X+3)+...+(x+50)=1375

=> {X+X+X+...+X}+{1+2+3+...+50}=1375

=> {X+X+X+...+X}+{(1+50)x[(50-1):1+1]:2}=1375

=> {X+X+X+...+X}+{51x[49:1+1]:2}=1375

=> {X+X+X+...+X}+{51x[49+1]:2}=1375

=> {X+X+X+...+X}+{51x50:2}=1375

=> 50X+{2550:2}=1375

=> 50X+1275=1375

=> 50X=1375-1275

=> 50X=100

=> X=100:5

=> X=2

Answer 3

<= >(x+x+....+x) + (1+2+3+4+5+......+50) = 1375

<=> 50x + 50 . (50+1) : 2 = 1375

<=> 50x + 1275 = 1375

<=> 1375 - 1275 = 50x

<=> 50x = 100

<=> x= 100 : 50

x = 2

Answer 4

2 + X + 3 +X + X = 50

Answer 5

Ta có: \(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+50\right)=1375\)

           \(\left(x+x+x+...+x\right)+\left(1+2+3+...+50\right)=1375\)

           \(50x+\frac{\left(50+1\right).50}{2}=1375\)
           \(50x=1375-1275\)

           \(x=\frac{100}{50}\)

           \(x=2\)

Vậy \(x=2\)

Answer 6

yyugkgkbyvbvritybgjuugk8yugbkhlbgy67lt8l