Question 349113
{{{a[n]=a[1]+(n-1)*d}}}
{{{d=a[2]-a[1]=-6-(-1)=-6+1=-5}}}
{{{a[n]=-1+(n-1)(-5)}}}
{{{a[n]=-1-5n+5}}}
{{{highlight_green(a[n]=4-5n)}}}
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{{{a[75]=4-5(75)}}}
{{{a[75]=4-375)}}}
{{{highlight(a[75]=-371)}}}