Write out the sum. E: +D+on+D (Type the rst, second. and nal terms. Type fully reduced fractions where appropriate.) Express the sum using summation notation. 1 2 3 14 2+3+4+ +14+1 1 2 3 14 ++Z+\"'+14+1=|1 (Simplify your answer. Use integers or fractions for any numbers in the expression.) Express the sum using summation notation. 1 1 1 1o 1 1++---+(1) T 2 4 8 2 Complete the sum of the sequence. it [4]