Q1 of 69 Page 66

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

1, 8, 15, 22, . . .


Here


1, 8, 15, 22, . . .


First term a = 1


Second term t1 = 8


Third term t2 = 15


Fourth term t3 = 22


We know that d = tn + 1 – tn


Thus, t2 – t1 = 15 – 8 = 7


t3 – t2 = 22 – 15 = 7


Thus, d = 7


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