Explicit equations for the nth term of an arithmetic sequence follow a certain format.
a_n= a_1+( n-1) d
In this form, a_1 is the first term in the sequence, d is the common difference, and n is the position of the desired term in the sequence. We are given that a_1= - 1 and d= - 5, so we can substitute these values to write the equation.
a_n= - 1+( n-1)( - 5)
Let's also simplify this equation.
