each of the following expressions, write down an equivalent expression where the last term in the sum is outside the summation. (a) 17 E 2*. k=0 (b) 21 E (3k2 – 2k + 1). k=-2 (c) E (3k2 – 2k +1). k=-2 (d) p+3 E (3k2 – 2k + 1). k=-2 (e) р-1 E (3k2 – 2k + 1). - k=-2