Question 949281
{{{a[1]+(n-1)d}}}  is a formula in general for any term of an arithmetic sequence, n being the index.


JUST FILL IN THE GIVEN VALUES.


{{{-3+(n-1)*4}}}
{{{highlight(-3+4(n-1))}}}


You might try to simplify that.
{{{-3+4n-4}}}
{{{4n-7}}}-----simplified