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Find the sum to n terms of the A.P., whose nth term is 5n + 1
- a)n/2
- b)
- c)
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Find the sum to n terms of the A.P., whose nth term is 5n + 1a)n/2b)c)...
Concept:
For AP series,
Sum of n terms = n/2 (First term + nth term)
For AP series,
Sum of n terms = n/2 (First term + nth term)
Calculations:
We know that, For AP series,
the sum of n terms = n/2 (First term + nth term)
Given, the nth term of the given series is an = 5n + 1.
Put n = 1, we get
a1 = 5(1) + 1 = 6.
We know that
sum of n terms = n/2 (First term + nth term)
⇒Sum of n terms =
⇒Sum of n terms =
We know that, For AP series,
the sum of n terms = n/2 (First term + nth term)
Given, the nth term of the given series is an = 5n + 1.
Put n = 1, we get
a1 = 5(1) + 1 = 6.
We know that
sum of n terms = n/2 (First term + nth term)
⇒Sum of n terms =
⇒Sum of n terms =
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Find the sum to n terms of the A.P., whose nth term is 5n + 1a)n/2b)c)d)None of theseCorrect answer is option 'C'. Can you explain this answer?
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