(ix) given as,U, u() given /-28, S-144, and there are total 9 terms. F – InterviewSolution

1.

(ix) given as,U, u() given /-28, S-144, and there are total 9 terms. Find a.

Answer»

We know,

S = n/2 × ( a + l)

144 = 9/2 × ( a + 28)

(144 × 2)/9 = a + 28

32 = a + 28

a = 32 - 28

a = 4

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