TS EAMCET · Maths · Sequences and Series
If to terms then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given 11·5+15·9+19·13+… to n terms =27109. We know that the nth term of an A.P., a, a+d, a+2d,... is a+n-1d. Hence, the nth term of 1, 5, 9,... is 1+n-14=4n-3 and that of 5, 9, 13,... is 5+n-14=4n+1. Thus, the given series…
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