Question

if the first term of an ap is 2.5 and the common difference is -3 then the fifteenth term of ap is​

Answer 1

Given ,

First term (a) = 2.5

Common difference (d) = -3

We know that , the first nth term of an AP is given by

$\mathtt{ \large{ \fbox{ a_{n} = a + (n - 1)d }}}$

Thus ,

15th term = 2.5 + (15 - 1)(-3)

15th term = 2.5 - 42

15th term = -40.5

Hence , the 15th term of an AP is -40.5

Answer 2

Answer:

39.5

Step-by-step explanation:

15th term = a+(n-1)d

a=1.5

d=-3

then,

2.5+(15-1)-3

=39.5