Question

find the sum 34+33+30.....+10​

Answer 1

Answer:

hope this helps you

please mark as Branlists

Answer 2

Answer:

a=34

d=a2-a1

=33-34

=-1

an=a+(n-1)d

10=34+(n-1)(-1)

10-34=-(n-1)

n-1=24

n=25

sn=25/2(34+10)

sn=550