Question

the first term of an Ap is 4 and it's common difference -2 .Find it's 16th term

Answer 1

16th term

= a + (n-1)d
= 4 + ( 16-1) -2
= 4+ 15*-2
= 4 + (-30)
= 4-30
= -26

Answer 2

$tn = a + n - 1d$
answer is -26