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Question

If nth of a sequence is given by Tn=2n+1, then the sum of 4 terms is

A
16
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B
24
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C
28
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D
32
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Solution

The correct option is B 24
Tn=2n+1T1=3,T2=5,T3=7,T4=9
Therefore, the required sum
=3+5+7+9=24

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