Answer :

The fifth term of the arithmetic sequence is 84

How to determine the value

The formula for determining the nth term of an arithmetic sequence is expressed as;

Tn = a + (n -1)d

Where;

  • a  is the first term
  • n is the number of terms
  • d is the common difference

To determine the fifth term, we have to substitute the value of nas 5, we have;

T5 = 4 + (5-1) 20

T5 = 4 + 4(20)

expand the bracket

T5 = 4 + 80

T5 = 84

Thus, the fifth term of the arithmetic sequence is 84

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The complete question;

An arithmetic sequence has first term 4 and constant difference 20. Find the fifth term of the sequence

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