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Question
Find the nth term of the following sequence
3, 8, 13, 18, ...
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Solution
3, 8, 13, 18
a = 3
d = 5
tn = a + (n – 1)d
= 3 + (n – 1)5
= 3 + 5n – 5
= 5n – 2
∴ nth term is 5n – 2
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