Question

Bantu jawab ya :) makasih

Answer 1

Aritmetika
a= 5
b= 2

Sn = n/2(2a+(n-1)b)
S10 = 10/2(2.5+(10-1)2)
S10= 5(10+9.2)
S10 = 5(10+18)
S10 = 5 . 28
S10= 140

Jumlah tumpukannya 140

Answer 2

U10= a+(n-1)*b
U10= 5+(10-1)*2
U10= 5+(9*2)
U10= 5+18
U10= 23

Sn10= (a+akhir)*n/2
Sn10= (5+23)*10/2
Sn10= 28*5
Sn10= 140 (c)