SOLUTION: For an arithmetic progression, a1, a2, a3,..... aN, if a4/a7=2/3, find a6/a8.

Algebra ->  Sequences-and-series -> SOLUTION: For an arithmetic progression, a1, a2, a3,..... aN, if a4/a7=2/3, find a6/a8.       Log On


   

Question 1162488: For an arithmetic progression, a1, a2, a3,..... aN, if a4/a7=2/3, find a6/a8.
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


Let the 4th term be x, and let the common difference be d. Then

x%2F%28x%2B3d%29+=+2%2F3
2%28x%2B3d%29+=+3x
2x%2B6d+=+3x
x+=+6d

Then