Question

125+(-225)+325+(-425)+525+(-625)+725+(-825)+...+1.925+(-2.025)

Answer 1

Jawaban=-100 dikali 10=-1000
U1=-100
U2=-100
U3 sampai U20/2=-100

Answer 2

125+(-225)+325+(-425)+525+(-625)+725+(-825)+...+1.925+(-2.025)
= (125-225) + (325-425) + (525-625) + (725-825)+...+(1725-1825) + (1925-2025)
   jadi semuanya ada 10 kelompok yang masing-masing hasilnya - 100
= 10 x (-100) = - 1000
Jadi, nilai 125+(-225)+325+(-425)+525+(-625)+725+(-825)+...+1.925+(-2.025)
= - 1000