Question 1001125

Write an equation for the nth term of each arithmatic sequence. -5,-2,1,4,7
<pre>Equation of a specific term of an AP: {{{a[n] = a[1] + (n - 1)d}}}
Common difference: - 2 - - 5, or - 2 + 5, or 3
{{{a[n] = - 5 + (n - 1)3}}} ------ Substituting - 5 for {{{a[1]}}}, and 3 for d
{{{a[n] = - 5 + 3n - 3}}}
{{{highlight_green(a[n] = 3n - 8)}}}