Question

x+ ( x+2) + (x+4) + ( x+6) +....... + (x+98)+ (x+100) =2601

tìm X

Answer 1

x+ ( x+2) + (x+4) + ( x+6) +....... + (x+98)+ (x+100) =2601

x + x + 2 + x + 4 + x + 6 + ... + x + 98 + x + 100 = 2601

x + x + x + .... + x   ( 51 chữ x ) + ( 2 + 4 + 6 + ... + 98 + 100 ) = 2601 

51x +  2550 = 2601

51x = 51

x = 1