Diketahui barisan bilangan 2,4,7,11,...,56 rumus suku ke-n barisan tersebut adalah..
a. Un= 1/2(n+3)
b. Un= 1/2(n²+n+2)
c. Un= 1/2(n+2)
d. Un= 3/4(n²+3)
Pake cara yah yang jelas
a. Un= 1/2(n+3)
b. Un= 1/2(n²+n+2)
c. Un= 1/2(n+2)
d. Un= 3/4(n²+3)
Pake cara yah yang jelas
More Questions From This User See All
Misal: U2= 1/2(n+3)
= 1/2(2+3)
=1/2 (5) = 2,5 (U2 seharusnya 4 jd pilihan A salah)
b. Un= 1/2(n2+n+2)
U2= 1/2(2^2+2+2)
= 1/2 (8) = 4 (pilihan B benar)
c. Un= 1/2(n+2)
U2= 1/2(2+2)
= 1/2 (4) = 2 (pilihan C salah)
d. Un = 3/4(n2+3)
U2= 3/4(2^2+3)
= 3/4 (7) = 21/4= 52,5 (pilihan D salah)