Question

Given the sequence in the table below, determine the sigma notation of the sum for term 4 through term 15.

n an
1 4
2 −12
3 36
the summation of 4 times negative 3 n, from n equals 4 to 15.
the summation of 4 times negative 3 n, from n equals 1 to 15.
the summation of 4 times negative 3 to the n minus 1 power, from n equals 1 to 15.
the summation of 4 times negative 3 to the n minus 1 power, from n equals 4 to 15.

Answer 1

The third line seems to fit.
Refer to the Mathematica attachment.