Question is attached.

Asked by sudhanshubhushanroy | 8th Dec, 2017, 06:43: AM

Expert Answer:

begin mathsize 16px style Let space straight a comma space straight b comma straight c comma space straight d space are space four space numbers. space where space straight a equals 0
Since space first space three space numbers space are space in space AP
straight b minus straight a equals straight c minus straight b
2 straight b equals straight a plus straight c......... left parenthesis 1 right parenthesis
Last space three space are space in space GP space straight b comma straight c comma straight d space are space in space GP space and space common space ratio space is space 1 half
straight c over straight b equals straight d over straight c equals 1 half
straight b equals 2 straight c space and space straight d equals 0
straight b equals 2 straight c equals 4 straight d....... left parenthesis 2 right parenthesis
Solve space left parenthesis 1 right parenthesis space and space left parenthesis 2 right parenthesis space you space will space get space straight d equals 1 space and space correct space option space is space straight d. end style

Answered by Sneha shidid | 11th Dec, 2017, 11:10: AM