Question

What is the sum of a 23-term arithmetic sequence where the first term is 9 and the last term is 97? (2 points)
A) 1,219
B) 1,472
C) 1,725
D) 1,978

Answer 1

sn= sum of

n = the term you are looking for
a1= first term
a2= last term

Answer 2

sub in where necessary you get answer a

Answer 3

umm