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  • The nth term of the A.P. a, 3a, 5a, …… is Option: 1 na Option: 2 (2n-1)a Option: 3 (2n+1)a Option: 4 2na

The nth term of the A.P. a, 3a, 5a, …… is
Option: 1 na
Option: 2 (2n-1)a
Option: 3 (2n+1)a
Option: 4 2na

Answers (1)

\begin{array}{l} a, 3 a, 5 a .... \\ d = 2a \\ a_{n}=a+(n-1) \cdot 2 a \\ =a[1+2 n-2] \\ =a[2 n-1] \end{array}

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