Question

Tolong jawab secepatnya no 5

Answer 1

Misalkan
S1 = ½ x 10 = 5
S2 = 1 x 9 = 9
U1 = S1 = 5
U2 = S2 - S1 = 9-5 = 4
beda = U2-U1 = 4-5 = -1
Un = U1 + b(n-1)
Un = 5 -1(n-1)
Un = 5 -n + 1
Un = 6 - n
jawaban : a