Question

Find the sum of first 25 terms of an A.P. whose nth term is given by : 5-6n

Answer 1

n=25 l=5-6(25) =5-150=-145

a=5-6=-1

sum =n(a+l) /2

=25(-146) /2

=25(-73) =-1825

Answer 2

please brainlist my answer