Question 1198088
<pre><font face = "consolas" color = "indigo" size = 3><b>
Hi  
AP:  {{{a[n]=a[1]+(n-1)*d}}}, {{{S[n]= (n/2)(2*a[1]+ (n-1)d)}}}
{{{a[2] = -2 + d = 4}}}, d = 6 , {{{S[10]= (10/2)(2*(-2)+ 9*6)}}} = 250

GP: {{{a[n] = a[1]*r^(n-1)}}},    {{{S(n) = a[1]((1-r^n)/(1-r))}}}
 {{{a[2] = (-2)r = 4}}}, r = -2,   {{{S(10) = (-2)((1-(-2)^10)/(3))}}} = 682

Wish You the Best in your Studies.
</font></b></pre>