(1) The 15th term of an A.P. is 3 more than twice its 7th term. If the 10th term of A.P. is 41. find its nth term.
Physics
rohit1349
Question
(1) The 15th term of an A.P. is 3 more than twice its 7th term. If the 10th term of
A.P. is 41. find its nth term.
A.P. is 41. find its nth term.
2 Answer

1. User Answers knoeledgebooster
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2. User Answers debu06
Explanation:
The nth term of the AP is .
The nth term of an AP is given by the formula , where a is the first term ,d is the common difference.
Therefore , 15th term of an AP is 3 more than twice the 7th term of the AP
a  2d = 3 (Equation 1)
Now,
10th term of the AP is 41
a + 9d = 41 (Equation 2)
On subtracting equation 2 from equation 1 , we get
d = 4
Now substituting the value of d in equation 1, we get
a = 5
Therefore, the nth term of the AP becomes
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