Dik:18,6,2 Dit:U5,s5

Penjelasan dengan langkah-langkah:

a = 18

b = -12

U5 = 18 + (5 – 1)(-12)

=18 + (4)(-12)

=18 -48

= (-30)

S5 = 5/2(2(18)+(5-1)(-12))

= 2,5(36 +(4)(-12))

=2,5(36-48)

=2,5(-12)

=.(-30)

semoga membantu…