Problem: If x,2x+2,3x+3,β¦ are in geometric progression, the fourth term is:
Answer Choices:
A. β27
B. β1321β
C. 12
D. 1321β
E. 27
Solution:
The common ratio is x2x+2β=2x+23x+3β=23β,xξ =0,xξ =β1
β΄2x+2=23βx,x=β4β΄ the 4 th term is (β4)(23β)3=β1321β