Question

E=1-2-3+4+5-6-7+8+...+21-22-23+24

 

Answer 1

E=1-2-3+4+5-6-7+8+...+21-22-23+24

=0+0+...+0

=0.12

=0

Answer 2

E = 1 - 2 - 3 + 4 + 5 - 6 - 7 + 8 + ... + 21 - 22 - 23 + 24 (có 24 số; 24 chia hết cho 4)

E = (1 - 2 - 3 + 4) + (5 - 6 - 7 + 8) + ... + (21 - 22 - 23 + 24)

E = 0 + 0 + ... + 0

E = 0

Answer 3

E = 1 - 2 - 3 + 4 + 5 - 6 - 7 + 8 + ... + 21 - 22 - 23 + 24 (có 24 số; 24 chia hết cho 4)

E = (1 - 2 - 3 + 4) + (5 - 6 - 7 + 8) + ... + (21 - 22 - 23 + 24)

E = 0 + 0 + ... + 0

E = 0

 ok

Answer 4

E = 1 - 2 - 3 + 4 - 5 - 6 - 7 + 8 ...... + 21 - 22 - 23 + 24

=0+0....+0

=0.12

=0

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