Question

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What is the 9th term in the following sequence?

11, 17, 23, 29, . . .


A. 47

B. 53

C. 59

D. 65

Answer 1

the common difference is 17-11 =6

an= a1+d(n-1)

a9 = 11 +6(9-1)

a9 = 11 +6(8)

a9 = 11 + 48

a9 = 59

Choice C