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Question

Write the first five terms of each of the following sequences whose nth terms are:an=3n

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Solution

The nth term of the sequence is

an=3n...................eq(1)

1) For finding the first term of sequence (a1) put n=1 in eq(1)
a1=31
a1=3

2) For finding the second term of sequence (a2)put n=2 in eq(1)
a2=32
a2=3×3
a2=9

3) For finding the third term of sequence (a3) put n=3 in eq(1)
a3=33
a3=3×3×3
a3=27

4) For finding the fourth term of sequence (a4) put n=4 in eq(1)
a4=34
a4=3×3×3×3
a4=81

5) For finding the fifth term of sequence (a5) put n=5 in eq(1)
a5=35
a5=3×3×3×3×3
a5=243


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