Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Sequence and Series
0 votes

If 1 , 3 , 8 are first three terms of an arithmetic - geometric progression (with +ve common difference ) , the sum of next three terms is :


Can you answer this question?

1 Answer

0 votes
Answer : (a) 180
Explanation : Given , a=1
Subtracting (1) from (2)
Next three terms ,
$(1) \quad\; (1+3d)\;r^3 =(1+\large\frac{3}{2})\;8=20$
Sum of next three terms = $\;20+48+112=180\;.$
answered Jan 23, 2014 by yamini.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App