Question

find 21th term of series 16,11
,6​

Answer 1

Answer:

-84

Step-by-step explanation:

this is a series of arithmetic progression.

in this common difference is -5 .

we all know that

an=a+(n-1)×d

a21=16+(21-1)×(-5)

=16-100

= -84

Hope this will help you