# Arithmetic Progressions

#### Question 3:

For the following A.P.s, write the first term and the common difference.

(i) 3, 1, − 1, − 3 …

(ii) − 5, − 1, 3, 7 …

(iii)

(iv) 0.6, 1.7, 2.8, 3.9 …

#### Answer:

(i) 3, 1, −1, −3 …

Here,
first term, *a* = 3

Common
difference, *d* = Second term − First term

= 1 − 3 = −2

(ii) −5, −1, 3, 7 …

Here,
first term, *a* = −5

Common dâ€¦

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