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 |
Bestimme Aufgaben zu den Folgen |
a)
a13 |
= |
1+(13-1)*1) |
= |
13 |
a18 |
= |
1+(18-1)*1) |
= |
18 |
s10 |
= |
10(2*1+9*1) 2 |
= |
55 |
s20 |
= |
20(2*1+19*1) 2 |
= |
210 |
b)
a8 |
= |
3+(8-1)*2) |
= |
17 |
a11 |
= |
3+(11-1)*2) |
= |
23 |
s8 |
= |
8(2*3+7*2) 2 |
= |
80 |
s14 |
= |
14(2*3+13*2) 2 |
= |
224 |
c)
a6 |
= |
2+(6-1)*3) |
= |
17 |
a12 |
= |
2+(12-1)*3) |
= |
35 |
a18 |
= |
2+(18-1)*3) |
= |
53 |
s10 |
= |
10(2*2+9*3) 2 |
= |
155 |
d)
a17 |
= |
4+(17-1)*5) |
= |
84 |
a24 |
= |
4+(24-1)*5) |
= |
119 |
s6 |
= |
6(2*4+5*5) 2 |
= |
99 |
s24 |
= |
24(2*4+23*5) 2 |
= |
1476 |
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