Question

Bantu aku teman teman

Answer 1

Verified answer

5. dik
a=1 b=11
U100=a+99b =1+99(11)=1+1089=1090

6.dik
a=2 b=4
Sn=n/2 (2a+(n-1)b)
=n/2 (2(2)+(n-1)4)
=n/2 (4-4+4n)
=n/2 (4n) =2n^2

Answer 2

Verified answer

Barisan dan Deret

No.5
beda (b) = U2 - U1
b = 12 - 1
b = 11

Un = U1 + (n - 1) b
U100 = 1 + (100-1) 11
U100 = 1 + 99 x 11
U100 = 1 + 1089
U100 = 1090
Jawabannya yang A.

No.6
beda (b) = U2 - U1
b = 6 - 2
b = 4

Sn = n/2 (2 x U1 + (n - 1)b)
Sn = n/2 (2 x 2 + (n - 1)4)
Sn = n/2 (4 + 4n - 4)
Sn = n/2 x 4n
Sn = 2n^2
Jawabannya yang C.

*semoga membantu. sukses selalu ^_^