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Question

Write the first five terms of each of the following sequences whose nth terms are: an=3n25

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Solution

an=3n25...................eq(1)

1) To find the first term of sequence (a1) put n=1 in eq(1)
a1=3×125
a1=325
a1=15

2)To find the second term of sequence (a2) put n=2 in eq(1)

a2=3×225
a2=625
a2=45

3)To find the third term of sequence (a3) put n=3 in eq(1)
a3=3×325
a3=925
a3=75

4) To find the fourth term of sequence (a4) put n=4 in eq(1)
a4=3×425
a4=1225
a4=105
a4=2

5) To find the fifth term of sequence (a5) put n=5 in eq(1)
a5=3×525
a5=1525
a5=135


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