Question 1085415
1)  The differences for the four terms given are 12,20,28,  so I'd say the next two differences are 36 and 44:

39+36 = 75
75+44 = 119

Ans: The next two terms are 75, 119
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2)  {{{ A[0] = (-1)^0(13(0)-6) = 6 }}}
      {{{ A[1] = (-1)^1(13(1) - 6) = -1*7 = -7 }}}
      {{{ A[2] = (-1)^2(13(2) - 6) = 20 }}}
       {{{ A[3] = (-1)^3(13(3) - 6) = -33 }}}
       {{{ A[4] = (-1)^4(13(4) - 6) = 46 }}}
        etc.