Diket barisan aritmaika 10,7,4,1 jumlah suku ke 16 pertama
Jawaban Terkonfirmasi
A = U1 = 10
b = U2 – U1
b = 7 – 10
b = -3
S16 = n/2 . (2a + (n – 1) . b)
S16 = 16/2 . (2 . 10 + (16 – 1) . (-3))
S16 = 8 . (20 + 15 . (-3))
S16 = 8 . (20 – 45)
S16 = 8 . (-25)
S16 = -200
Jawaban Terkonfirmasi
Diketahui:
a = 10
b = -3
Ditanya:
S16 = ?
Jwab:
Sn = n/2 (2a+(n-1)b)
S16 = 16/2 (2(10)+(16-1)-3)
S16 = 8(20+(-45))
S16 = 8(-25)
S16 = -200
Salam..
Smoga suksess ^^