tolong di bantu pakai cara ya kk dan teman teman yang nomer 3

= -100 - 99 - … - 1 - 0
= (-100 - 0) + (-99 - 1) + …
= -100 + -100 + …
= -100 x 50
= -5000

= 1 + 2 + 3 + ... + 49 + 50
= (1 + 50) + (49 + 2) + …
= 51 + 51 + …
= 51 x 25
= 1.275

Jawaban:
= -5000 + 1.275
= -3.725