A=2+4+6+...+100-1-3-5-...-95
A=(2-1)+(4-3)+...+(96-95)+98+100
A=1+1+1+...+1+198 (48 số hạng 1)
A=48.1+198
A=48+198
A=246
\(A=\frac{\left(100+2\right)49}{2}-\frac{\left(95+1\right)47}{2}=2499-2256=243\)
A = ( 2 + 4 + 6 + ... + 100 ) - ( 1 + 3 + 5 + ... + 95 )
A = ( 100 - 2 ) : 2 + 1 - ( 95 - 1 ) : 2 + 1
A = 50 - 48
A = ( 100 + 2 ) x 50 : 2 - ( 95 + 1 ) x 48 : 2
A = 2550 - 2304
A = 246
A = ( 2 + 4 + 6 + ... + 100 ) - ( 1 + 3 + 5 + ... + 95 )
A = ( 100 - 2 ) : 2 + 1 - ( 95 - 1 ) : 2 + 1
A = 50 - 48
A = ( 100 + 2 ) x 50 : 2 - ( 95 + 1 ) x 48 : 2
A = 2550 - 2304
A = 246
A = ( 2 + 4 + 6 + ... + 100 ) - ( 1 + 3 + 5 + ... + 95 )
A = ( 100 - 2 ) : 2 + 1 - ( 95 - 1 ) : 2 + 1
A = 50 - 48
A = ( 100 + 2 ) x 50 : 2 - ( 95 + 1 ) x 48 : 2
A = 2550 - 2304
A = 246
A = ( 2 + 4 + 6 + ... + 100 ) - ( 1 + 3 + 5 + ... + 95 )
A = ( 100 - 2 ) : 2 + 1 - ( 95 - 1 ) : 2 + 1
A = 50 - 48
A = ( 100 + 2 ) x 50 : 2 - ( 95 + 1 ) x 48 : 2
A = 2550 - 2304
A = 246
A = ( 2 + 4 + 6 + ... + 100 ) - ( 1 + 3 + 5 + ... + 95 )
A = ( 100 - 2 ) : 2 + 1 - ( 95 - 1 ) : 2 + 1
A = 50 - 48
A = ( 100 + 2 ) x 50 : 2 - ( 95 + 1 ) x 48 : 2
A = 2550 - 2304
A = 246
A = ( 2 + 4 + 6 + ... + 100 ) - ( 1 + 3 + 5 + ... + 95 )
A = ( 100 - 2 ) : 2 + 1 - ( 95 - 1 ) : 2 + 1
A = 50 - 48
A = ( 100 + 2 ) x 50 : 2 - ( 95 + 1 ) x 48 : 2
A = 2550 - 2304
A = 246