This is the basic and conceptual question from Chapter name- Arithmetic Progression
Chapter number- 9
In this question we have been given that the third term of an A.P. is 7 and the seventh term exceeds three times the third term by 2.
Now we have to find the first term, the common difference and the sum of first 20 terms.
CBSE DHANPAT RAI publications
Solutions of CBSE Mathematics