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(iv) *a *= – 1, \(d=\frac{1}{2}\)

3. For the following APs, write the first term and the common difference:

(iii) \(\frac{1}{3}, \frac{5}{3}, \frac{9}{3}, \frac{13}{3}, …\)

(ii) \(2, \frac{5}{2}, 3, \frac{7}{2}, …\)

(iii) -1.2, -3.2, -5.2, -7.2, …

(v) 3, \(3+\sqrt2\), \(3+2\sqrt2\), \(3+3\sqrt2\), …

(vi) 0.2, 0.22, 0.222, 0.2222, …

(viii) \(-\frac{1}{2}, -\frac{1}{2}, -\frac{1}{2}, …\)

(xii) \(\sqrt2, \sqrt8,\)\(\sqrt{18}, \sqrt{32}, …\)

(xiii) \(\sqrt3, \sqrt6, \sqrt9, \sqrt{12}, …\)