Tolong bantuannya pagi ini dikumpul No 4 aja pakai cara nya bantuin pleaseeee!!!
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b =101 1/2 - 105= - 3 1/2
rumus suku ke n nya adalah
Un=a+(n-1)b
=105+(n-1) - 3 1/2
=105 + 3 1/2 - 3 1/2 n
= 108 1/2 - 3 1/2 n
Un= a + (n -1)b
0= 105 + (n - 1)-3,5
0=105 + 3,5 - 3,5n
108,5 - 3,5n=0
-3,5 n= - 108,5
n = - 108.5/-3,5
n= 31
jadi 0 ada di suku ke 21
semoga membantu