1.
5 i
∑ ∏ j²
i =3 j =1
= j=1∏3 j2 + j=1∏4 j2 + j=1∏5 j2
= 12 * 22 * 32 + 12 * 22 * 32 * 42 + 12 * 22 * 32 * 42 * 52
= 15012
2.
5
∏ 4*m+3
m = 0
= (4*0+3) * (4*1+3) * (4*2+3) * (4*3+3) * (4*4+3) * (4*5+3)
= 1514205
3.
\(\sum\limits_{i=1}^{7} 1/2 * i/3\)
= 1/2 * 1/3 + 1/2 * 2/3 + 1/2 * 3/3 + 1/2 * 3/3 + 1/2 * 4/3 + 1/2 * 5/3 + 1/2 * 6/3 + 1/2 * 7/3
= 31/6
Gruß Wolfgang