Minta tolong jawab dengan caranya ya

jawab

8)
pola 1 = 1 x 3
pola 2 = 2 x 5
pola 3 = 3 x 7
pola n = n (2n + 1)
pola 10 = 10(21) = 210

9)
u2 = 9
u5= 243

u5 : u2 = 243 : 9
r³ = 27
r = 3

u2 = 9
ar= 9
a = 9/r = 9/3 = 3

u10 = ar⁹ = 3. 3⁹
u10= 3¹⁰ = 59.049