For the arithmetic sequence with given first term 4 and common difference 4:

Question

its nth term is __________
its 10-th term is ________

Answer 1

https://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html
a = 4
d = 4

and do you not have a text book ?

Answer 2

Nth term=a+(n-1)d 10 term=4+(10-1)4 10th term =4+(9*4)=4+36=40 10th term =40