What is the 100th number in the sequence?

If we count by 3s starting with 1, the following sequence is obtained: 1,4,7,10, ... What is the 100th number in the sequence?

MetroEye: t_n=a+(n-1)d
where t_n = n^th term of the sequence
a = first term of the sequence
n = number of terms in the sequence
d = common difference of the sequence

In the given sequence, a=1,n=100,d=3 
=> t₁₀₀=1+(100-1)3=298
So the 100^th term of the sequence is 298