The first term of an ap is -5 and the the common difference is -2 then the sum of first 6 team is

The first term of an ap is -5 and the the common difference is -2 then

1.	The first term of an ap is -5 and the the common difference is -2 then the sum of first 6 team is
Answer» Given a =-5 and d=-2 , n= 6To find 6th terrm so here we will use Sn formula :Sn=n/2{a+(n-1)d}Putting the given values on this formula:Sn =6/2{-5+(6-1)-2}S6= 3{-5+(5×(-2)}S6=3(-5-10)S6=3×(-15)S6=-45