Q1 of 69 Page 66

Write the correct number in the given boxes from the following A. P.

3, 6, 9, 12, . . .


Here


3,6,9,12, . . .


First term a = 3


Second term t1 = 6


Third term t2 = 9


Fourth term t3 = 12


We know that d = tn + 1 – tn


Thus, t2 – t1 = 9 – 6 = 3


t3 – t2 = 12 – 9 = 3


Thus, d = 3


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