Tolong ya besok ulangan
Matematika
MeypinL
Pertanyaan
Tolong ya besok ulangan
1 Jawaban
-
1. Jawaban whongaliem
U9 = a + 8b = - 52
U15 = a + 14b = - 16
----------------------- -
- 6.b = - 36
b = 6
a + 8b = - 52
a + 8 .6 = - 52
a + 48 = - 52
a = - 52 - 48
a = - 100
Un = n/2 { 2 .a + (n - 1) .b}
S101 = 101/2 { 2 . - 100 + (101 - 1) 6 }
= 102/2 ( - 200 + 600)
= 102 / 2 (400)
= 102 (200)
= 20400