Question

Tìm X biết  (X + 1) + ( X + 3 ) +(X + 5 )+ …+ (X + 99) = 2550

Answer 1

(x+1)+(x+3)+(x+5)+......+(x+99) = 2550

(x+x+x+....+x)+(1+3+5+....+99) = 2550

50x + 2500 = 2550

50x = 2550 - 2500

50x = 50

x = 50 : 50

x = 1

Answer 2

X=1 nhe

Answer 3

X = 1

chắc chắn 100%

Answer 4

(x + 1) + (x + 3) + (x + 5) + ... + (x + 99) = 2550

=> (x + x + x + ... + x) + (1 + 3 + 5 + ... + 99) = 2550

         có 50 số x                 có 50 SH

=> 50x + [(1 + 99) . 50 : 2] = 2550

=> 50x + [100 . 50 : 2] = 2550 

=> 50x + [5000 : 2] = 2550

=> 50x + 2500 = 2550

=> 50x = 2550 - 2500

=> 50x = 50

=> x = 50 : 50

=> x = 1

Vậy x = 1