Question 750752
The formula you need is this:

{{{a[n]=a[1]+(n-1)d}}}

From the problem:

{{{a[1]=4}}}
{{{n=24}}}
{{{d=2}}}

So here we go:

{{{a[n]=a[1]+(n-1)d}}}

{{{a[24]=4+(24-1)*2}}}

{{{a[24]=4+(23)*2}}}

{{{a[24]=4+46}}}

{{{a[24]=50}}}