The second and fifth term of a geometric progression are 21 and 567 respectively. Find the first term and the common ratio of the progression

Answer 1

the 5th terms is the 3rd after the 2nd term, so their ratio is r^3. Thus,

r^3 = 567/21 = 27
r = 3
a = 21/3 = 7

Answer 2

Chu

Answer 3

If 8x,y-4 are in A.P find p and q