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2128a<br />
2 5 2 10<br />
5⋅ = ⋅ =<br />
13 1 13 13<br />
5∗2⎦13 2128d<br />
4 4 4 4 3 3<br />
4 = = ⋅ = = 3<br />
3 1 3 1 4 1<br />
4/4⎦3 2129a<br />
⎛ 4⎞ ⎛ 15⎞<br />
⎜− ⎟⋅⎜− ⎟<br />
⎝ 5⎠ ⎝ 16⎠<br />
( -4⎦5) ∗( -15⎦16) 4 15 3<br />
⋅ =<br />
5 16 4<br />
2130a<br />
3 ⎛ 2⎞<br />
−⎜− ⎟<br />
5 ⎝ 5⎠<br />
35 ⎦ − -2⎦5<br />
( )<br />
3 2 3+ 2 5<br />
+ = = = 1<br />
5 5 5 5<br />
LÖSNINGAR DEL B<br />
2128b<br />
3 3<br />
5 5 3 1 3<br />
= = ⋅ =<br />
8 8 5 8 40<br />
1<br />
35/8 ⎦<br />
2128e<br />
15 28 420 7<br />
⋅ = =<br />
32 75 2400 40<br />
15⎦32∗28⎦75 2129b<br />
36 ⎛ 12 ⎞<br />
⎜−⎟ 7 ⎝ 35⎠<br />
36⎦7 / -12⎦35 ( )<br />
36 35<br />
− ⋅ =−15<br />
7 12<br />
2130b<br />
4 ⎛ 3⎞<br />
+ ⎜− ⎟<br />
7 ⎝ 7⎠<br />
47 ⎦ + -3⎦7<br />
( )<br />
4 3 4−3 1<br />
− = =<br />
7 7 7 7<br />
2129c<br />
⎛−18 ⎞ ⎛ 6 ⎞<br />
⎜ ⎟ ⎜ ⎟<br />
⎝ 7 ⎠ ⎝−49⎠ ⎛ 18 ⎞ ⎛ 6 ⎞<br />
⎜− ⎟ ⎜− ⎟<br />
⎝ 7 ⎠ ⎝ 49⎠<br />
-18⎦7 / -6⎦49 18 6 18 49<br />
= ⋅ =<br />
7 49 7 6<br />
3⋅6 7 ⋅7<br />
⋅ = 21<br />
7 6<br />
2130c<br />
−7 ⎛−7⎞ − ⎜ ⎟<br />
12 ⎝ 4 ⎠<br />
7 ⎛ 7⎞<br />
− −⎜− ⎟<br />
12 ⎝ 4 ⎠<br />
-7⎦12− -7⎦4<br />
( )<br />
7 7 7 21<br />
− + =− +<br />
12 4 12 12<br />
7<br />
=<br />
6<br />
2128c<br />
1 3 1 4 4 2<br />
= ⋅ = =<br />
2 4 2 3 6 3<br />
12/34 ⎦ ⎦<br />
23<br />
2128 f<br />
15 15 9 15 1 15 5<br />
9 = = ⋅ = =<br />
28 28 1 28 9 252 84<br />
15⎦28/ 9<br />
2129d<br />
⎛−1⎞ ⎛−20⎞ ⎜ ⎟⋅⎜ ⎟<br />
⎝ 4 ⎠ ⎝ −3<br />
⎠<br />
⎛ 1⎞ ⎛20⎞ ⎜− ⎟⋅⎜ ⎟<br />
⎝ 4⎠ ⎝ 3 ⎠<br />
-1⎦4∗20⎦3 1 20 5 2<br />
− ⋅ =− =−1<br />
4 3 3 3<br />
2130d<br />
13 5<br />
+<br />
−20 −4<br />
13 ⎛ 5 ⎞<br />
− + ⎜− ⎟<br />
20 ⎝ 4 ⎠<br />
-13⎦ 20 + -5⎦4<br />
( )<br />
13 5 19<br />
− − =−<br />
20 4 10
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