Mathematics
The 15th term of the A.P. 3, 0, -3, -6, …… is :
-42
39
42
-39
AP GP
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Answer
In A.P.,
3, 0, -3, -6, ……
First term (a) = 3
Common difference (d) = 0 - 3 = -3.
By formula,
an = a + (n - 1)d
a15 = 3 + (15 - 1)(-3)
= 3 + 14 × -3
= 3 - 42
= -39.
Hence, Option 4 is the correct option.
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