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nth Term of A.P

If tn=5-2n,...

Question

If $t_{n} = 5 - 2 n$ , then $t_{n - 1} =$

A

2 n - 1

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B

7 + 2 n

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C

4 - 2 n

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D

7 - 2 n

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Solution

The correct option is D $7 - 2 n$
Given, $t_{n} = 5 - 2 n$
$=> t_{n - 1} = 5 - 2 (n - 1) = 5 - 2 n + 2 = 7 - 2 n$

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