Question

The first term of an ap is -2 and the 10th term is 16. Determine the 15th term

Answer 1

Answer:

a=-2, n=10, an=16.

15th term is 26.

Step-by-step explanation:

an=a+{n-1}d

If we have any three of this than we can find the fourth one.

=16={-2}+{10-1}d

=16={-2}+9d

=16+2=9d

=18/9=d

=2=d

=d=2.

So, 15th term is,

an=a+{n-1}d

a15={-2}+{15-1}2

=-2+{14}2

=-2+28

=26.

Hope this will help you.

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