Question 368722
{{{a[1]=2}}}
{{{d=a[2]-a[1]=-1-2=-3}}}
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{{{a[n]=a[1]+(n-1)*d}}}
{{{a[n]=2+(n-1)(-3)}}}
{{{a[n]=2-3n+3}}}
{{{highlight(a[n]=5-3n)}}}