o.k I know this is not a difficult problem but I keep making dumb mistakes and have not been able to get the answer! Any help would be appreciated!
Question: The first eight terms of an arithmetic series have a sum of 48. The common difference is 3. What are the first three terms of the series?
S8=48
cd=3
t1, t1+d, t1+2d,t1,3d, t1+4d,t1+5d,t1+6d,t1+7d
then i grouped togather like terms;
8t1+28d= 48
8t1+28(3)=48
t1=-4.5
Which doesn't work!
Question: The first eight terms of an arithmetic series have a sum of 48. The common difference is 3. What are the first three terms of the series?
S8=48
cd=3
t1, t1+d, t1+2d,t1,3d, t1+4d,t1+5d,t1+6d,t1+7d
then i grouped togather like terms;
8t1+28d= 48
8t1+28(3)=48
t1=-4.5
Which doesn't work!