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प्रश्न
The nth term of an A.P. is 6n + 4. The sum of its first 2 terms is ______.
विकल्प
16
20
26
None of these
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उत्तर
The nth term of an A.P. is 6n + 4. The sum of its first 2 terms is 26.
Explanation:
Given Tn = 6n + 4
∴ T1 = 6 × 1 + 4
= 6 + 4
= 10
T2 = 6 × 2 + 4
= 12 + 4
= 16
∴ S2 = T1 + T2
= 10 + 16
= 26
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