Question

find the first,fourth snd tenth terms of the Arithmetic sequence
A(n)=-11+(n-1)(4)

Answer 1

to find the first term replace n with 1
to find the fourth term replace n with 4
and so on...

Answer 2

For example, if I wanted the sixth term
I replace n with 6
like so:\[A(6)=-11+(6-1)(4) \\ A(6)=-11+5(4) \\ A(6)=-11+20 \\ A(6)=9\]
the 6th term of the sequence A is 9.