Question

No 1 dan 2 yaa mkasihhh :)

Answer 1

1. Sn = (3/2)(2^n - 1)

U₈ = S₈ - S₇
= (3/2)((2⁸ - 1) - (2⁷ - 1))
= (3/2)(2⁸ - 2⁷)
= (3/2)(256 - 128)
= (3/2)(128)
= 192

2. Lebih enak datanya diurutkan karena sedikit
5, 6, 6, 6, 6, 7, 7, 8, 9, 9
maka rata"nya: (6 + 7)/2 = 6,5