Q1 of 69 Page 66

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

70, 60, 50, 40, . . .


Here


70, 60, 50, 40, . . .


First term a = 70


Second term t1 = 60


Third term t2 = 50


Fourth term t3 = 40


We know that d = tn + 1 – tn


Thus, t2 – t1 = 50 – 60 = – 10


t3 – t2 = 40 – 50 = – 10


Thus, d = – 10


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