Show that each of the progressions given is an AP. Find the first term , common difference and next term of given series
`(iii) sqrt(20) ,sqrt(45) , sqrt(80) ,sqrt(125) . . . `

Explanation

To show that the given sequence \( \sqrt{20}, \sqrt{45}, \sqrt{80}, \sqrt{125} \) is an arithmetic progression (AP), we need to prove that the difference between consecutive terms is constant.

### Step 1: Identify the first term
The first term \( a_1 \) of the sequence is:
\[ a_1 = \sqrt{20} \]

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