Question

TLONG YA YG NO.6,TLONG SMA CRA.A JGU YA....TLONG CPET DJAWAB...BSOK DKUMPULIN NI!!!

Answer 1

Bagian a.

2 + 4 + 6 + 8 + 10 + ... + 100 = ???


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Bagian b.

-1 + 2 - 3 + 4 - 5 + 6 - 7 + 8 - ... + 100
= ( -1 + 2 ) + ( -3 + 4 ) + ( -5 + 6 ) + ( -7 + 8 ) + ... + 100
= 1 × 50
= 50
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Bagian c.

-100 - 99 - 98 - 97 - ... - 3 - 2 - 1 + 0 + 1 + 2 + 3 + ... + 97 + 98 + 99