(x+ 1) + (x+ 2) +...+ (x+ 100) = 5750
x+1 + x+2 +...+ x+100= 5750
100.x + (1+2+...+100)= 5750
100.x + 50.101= 5750
100.x + 5050= 5750
100.x= 5750 - 5050
100.x= 700
x= 700 :100
x= 7
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KA
30 tháng 8 2021 lúc 21:48
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
(x+1) + (x+2) + (x+3) +....+ (x+100) = 5750
x+1+x+2+x+3+.......x+100=5750
(x+1) + (x+2)+........+(x+100) = 5750
(x+1)+(x+2)+..............+(x+100)=5750
(x+1)+(x+2)+...+(x+100)=5750
(x+1)+(x+2)+...+(x+100)=5750
(x+1)+(x+2)+...+(x+100)=5750
(x+1)+(x+2)+...+(x+100)=5750