Find the `20^(t h)`term from the last term of the AP : 3, 8, 13, . . , 253.

Explanation

To find the 20th term from the last term of the arithmetic progression (AP) given by 3, 8, 13, ..., 253, we will follow these steps:

### Step 1: Identify the first term and the common difference
The first term (a) of the AP is 3. The common difference (d) can be calculated as:
\[ d = 8 - 3 = 5 \]

### Step 2: Determine the number of terms in the AP
The last term (l) of the AP is given as 253. We can use the formula for the nth term of an AP:
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