Question

║ 1 - 2 + 3 - 4 + 5 - 6 + 7 - ... + 99 - 100 ║ sama dengan ...

Answer 1

Verified answer

Berdasarkan rumus maka;
1+3+5+7+........+99=(100:2)^2=50x50=2500
-(2+4+6+8+.....+100)=-(102x25)=-2550

Maka 2500-2550=-50

Answer 2

1 - 2 + 3 - 4 + 5 - 6 + 7 - ..... + 99 - 100
(-1) + (-1) + (-1) + .... + (-1) ==> Sebanyak 50 suku
Jadi,
-1 x 50 = -50