12. Arithmetic
xn = a + (n-1) d
n = 5 (three aritmetic, 4 and 12)
Input the value:
12 = 4 + 4d
8 = 4d
d = 2
the value: 4, 6 , 8 , 10 , 12
13. Arithmetic
xn = a + (n-1) d
n = 4 (two aritmetic, 4 and 19)
Input the value:
19 = 4 + 3d
15 = 3d
d = 5
the value: 4, 9 , 14 , 19
14. geometric
[tex]\tt a_n=ar^{n-1}[/tex]
n = 4 (two geometric, 2 and 54)
input the value:
52 = 2r³
r = 3
the value: 2, 6, 18, 54
15. geometric
[tex]\tt a_n=ar^{n-1}[/tex]
n = 4 (two geometric, 5 and 40)
input the value:
40 = 5r³
r = 2
the value: 5, 10, 20, 40
