Question

Write down the 5th term in the sequence given by t(n) = n^2 +2n

Answer 1

So it our equation would be t(5)=5^2+2(5)
25+10=35 :)

Answer 2

Substitute n=5 in your equation....

Your sequence will become,

 t(5)=5^2+2(5)

 t(5) = 25+10=35