The value of the 15th term will be 172
1st term = 4
Second term = 16
Common difference = 16 - 4 = 12
The nth term of an arithmetic sequence is gotten by using the equation:
a + (n - 1)d
where,
a = first term = 4
n = number of terms = 15
d = common difference = 12
= a + (n - 1)d
= 4 + [(15 - 1) × 12]
= 4 + (14 × 12)
= 4 + 168
= 172
Therefore, the value of the 15th term will be 172
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