Q3 of 69 Page 61

Find the first term and common difference for each of the A.P.

0.6, 0.9, 1.2, 1.5, . . .

0.6, 0.9, 1.2, 1.5, . . .


First term a1 = 0.6


Second term a2 = 0.9


Third term a3 = 1.2


We know that d = an + 1 – an


Thus, d = a2 – a1 = 0.9 – 0.6 = 0.3


Hence, the common difference d = 0.3 and first term is 0.6


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