the first third and ninth term of a linear sequence are the first three terms of an exponential sequence.if the 7th term of the linear sequence is 14 calcuate the 20th term of the linear sequnce

Answer 1

AP:
T1 = a
T3 = a+2d
T9 = a+8d

GP:
T1 = a
T2 = ar
T3 = ar^2

a+6d = 14
a+2d = ar
a+8d = ar^2

Solve all that and you find
a=2
d=2
r=3
T20 of the AP is 2+19*2 = 40

Check:
AP: 2 4 6 8 10 12 14 16 18 20 ...
GP: 2 6 18 ...

Answer 2

How do "u solve all that"

Answer 3

the first, third and ni th term of an a.p are the first three term of an expotential sequence (g.p) if the seventh term of the linear equation is 14 calculate: the twentieth term of the sequence, the sum of the first twelve terms of the expotential sequence you need net to simplify any expotential term on your answer, find the sum of the first 101th term of the line sequence (A.P)