(a) a+d,a+3,a+6d
a+2,a+6,a+12
R= a+6/a+2 =a+12/9+6
(a+6)(a+6)=(a+2)(a+12)
a²+12a+36=a²+14a+24
36-24=14a-12a
12=12a
6=a
R= a+6/a+2 = 12/8 = 3/2 or 1.5
(b)last term=n th term
a+(n-1)d
h=18 6+(18-1)²
a=6 6+34
d=2 =40
(c)Term of the GP are 8,+12,+18,+....
A=8
r=3/2
h=14
Belan answered the question on February 28, 2019 at 15:14
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