Question

An =4n+5, find the first term a, coomon difference d and 12th term is a12

Answer 1

if An = 4n +5

a1 = 4(1) + 5= 9

a2= 4(2) +5 = 13

.

.

.

d = 13-9 = 4

A12 = a +(n-1)d

= 9 + (12-1)4

= 9 + 44

= 53

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Answer 2

Answer:

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