Mtk wajib kelas 11 nomor 7
Jawaban Terkonfirmasi
Bab Barisan dan Deret
Matematika SMA Kelas X
(n + 1)/n + (n + 3)/n + (n + 5)/n + …
b = U2 – U1
= (n + 3)/n – (n + 1)/n
= 2/n
U10 = a + 9b
= (n + 1)/n + 9 . 2/n
= (n + 1 + 18)/n
= (n + 19)/n
Sn = (n/2) . (a + Un)
S10 = (10/2) . ((n + 1)/n + (n + 19)/n)
= 5 . (2n + 20)/n
= (5/n) . 2 (n + 10)
= (10/n) . (n + 10)
jawabannya C