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Solution for Find the Sum to N Terms of the Arithmetic Progression, Whose Kth Term is 5k + 1. - CBSE (Arts) Class 11 - Mathematics

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Question

Find the sum to n terms of the A.P., whose kth term is 5k + 1.

Solution

It is given that the kth term of the A.P. is 5k + 1.

kth term = ak = + (k – 1)d

∴ + (k – 1)d = 5k + 1

a + kd – d = 5k + 1

Comparing the coefficient of k, we obtain d = 5

– = 1

⇒ a – 5 = 1

⇒ a = 6

  Is there an error in this question or solution?

APPEARS IN

 NCERT Mathematics Textbook for Class 11 (with solutions)
Chapter 9: Sequences and Series
Q: 7 | Page no. 185
Solution for question: Find the Sum to N Terms of the Arithmetic Progression, Whose Kth Term is 5k + 1. concept: Arithmetic Progression (A.P.). For the courses CBSE (Arts), CBSE (Commerce), CBSE (Science)
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