Q1 of 69 Page 78

Choose the correct alternative answer for each of the following sub questions.

For an given A.P. t7 = 4, d = – 4 then a = . . .

Now, By using nth term of an A.P. formula

tn = a + (n – 1)d


where n = no. of terms


a = first term


d = common difference


tn = nth terms


⇒ t7 = a + (7 – 1) × ( – 4)


⇒ 4 = a + 6 × ( – 4)


⇒ 4 = a – 24


⇒ a = 24 + 4 = 28


Thus, the correct answer is (D)

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