Question

Jawab no 2 abc sama caranya plisss

Answer 1

2a. 1+3+5+9+...+99= 50 angka
=(n²)= (50²) = 2.500
2b. 1-2+3-4+5-6+7-8+... -100
= -1×50= - 50
2c. -100-99-98-...-2-1-0+1+2+...+48+49+50
= -(1+100)×100 per 2+(1+50)×25 per 2
= -5050+1275
=-3775