Question

If the nth term in an A.P is 2n+5, then its first term is

Answer 1

Step-by-step explanation:

It is given that, First term, a=−1, Common Difference, d=−3, and Number of Terms, n=12

∴n

th

term of any AP is given by:

T

n

=a+(n−1)d

Hence,

T

12

=(−1)+(12−1)(−3)=−34