а1=3 d=4 as=?

It looks like you are referring to an arithmetic sequence where \( a_1 \) is the first term and \( d \) is the common difference.

In this case:

• \( a_1 = 3 \)
• \( d = 4 \)

To find the general formula for the \( n \)-th term \( a_n \) of the arithmetic sequence, you can use the formula:

\[ a_n = a_1 + (n - 1) \cdot d \]

Now, substituting the values of \( a_1 \) and \( d \):

\[ a_n = 3 + (n - 1) \cdot 4 \]

This simplifies to:

\[ a_n = 3 + 4n - 4 \] \[ a_n = 4n - 1 \]

So, the \( n \)-th term of the sequence is given by \( a_n = 4n - 1 \).

If you need to find a specific term (e.g., for \( n = 2 \), \( n = 3 \), etc.), you can substitute the value of \( n \) into this formula. Let me know if you would like to calculate a specific term or need help with anything else!