This is an arithmetic progression based question from Chapter name- Arithmetic Progression
Chapter number- 9
Exercise – 9.6
In this question we have been given that The sum of first n terms of an A.P. is 5n2 + 3n.
It is given that its mth term is 168,
Now we have to find the value of m. Also, the 20th term of this A.P.
CBSE DHANPAT RAI PUBLICATIONS
Understanding CBSE Mathematics
Class :- 10th
Question no 42