Respuesta :

a,b,c)

 To get the next number you multiply the previous number in the sequence with 1.5
sqdancefan
4a) The sequence is a geometric sequence with first term 4 and common ratio 6/4 = 9/6 = 1.5.

4b) a[1] = 4; a[n+1] = 1.5*a[n]

4c) a[n] = 4*1.5^(n -1) . . . . . . . . uses the standard form: an = a1*r^(n-1)