Question

if the first term of an a.p is 1 and common difference is 3,then​

Answer 1

Answer:

Correct option is

D

−34

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

∴nth term of any AP is given by:

Tn=a+(n−1)d

Hence,

T12=(−1)+(12−1)(−3)=−34