Diket: a=36, U12=-30, U7=…? Soal bariaan dan deret geometri menggunakan aritmatika Yg bisa jawab aku kasi paket 4gb..

Un = a + (n-1)b
U12 = 36 + (12-1)b
-30 = 36 + 11b
-30-36 = 11b
-66 = 11b
-66/11 = b
-6 = b
U7 = 36 + (7-1) -6
U7 = 36 + (6) -6
U7 = 36 + (-36)
U7 = 0