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4245a<br />
A1+ A2<br />
2 2<br />
(2x + 20 x) + (2x + 40x−250) 2 2<br />
2x + 20x+ 2x + 40x−250 2<br />
4x + 60x−250 4245c<br />
2A1−A2<br />
2 2<br />
2(2x + 20 x) − (2x + 40x−250) 2 2<br />
(4x + 40 x) − (2x + 40x−250) 2 2<br />
4x + 40x−2x − 40x+ 250<br />
2<br />
2x + 250<br />
4248a<br />
2<br />
px ( ) = x + 2x+ 11<br />
2<br />
p(3)<br />
= 3 + 2⋅ 3 + 11<br />
p(3)<br />
= 9 + 6 + 11<br />
p(3)<br />
= 26<br />
4248c<br />
2<br />
px ( ) = x + 2x+ 11<br />
2<br />
p(<br />
− 5) = ( − 5) + 2 ⋅( − 5) + 11<br />
p(<br />
− 5) = 25 + ( − 10) + 11<br />
p(<br />
− 5) = 25− 10+ 11<br />
p(<br />
− 5) = 26<br />
4249a<br />
2<br />
gz ( ) = 3z−z<br />
g(0)<br />
= 3⋅0−0 g(0)<br />
= 0 −0<br />
g(0)<br />
= 0<br />
4249c<br />
2<br />
gz ( ) = 3z−z<br />
g(<br />
− 1) = 3 ⋅( −1) −( −1)<br />
g(<br />
− 1) =−3−1 g(<br />
− 1) =−4<br />
2<br />
2<br />
LÖSNINGAR DEL B<br />
4245b<br />
A2 − A1<br />
2 2<br />
(2x + 40x−250) − (2x + 20 x)<br />
2 2<br />
2x + 40x−250 −2x −20x<br />
20x − 250<br />
4245d<br />
5A1−3A2 2 2<br />
5(2x + 20 x) − 3(2x + 40x−250) 2 2<br />
(10x + 100 x) − (6x + 120x−750) 2 2<br />
10x + 100x−6x − 120x+ 750<br />
2<br />
4x − 20x+ 750<br />
4248b<br />
2<br />
px ( ) = x + 2x+ 11<br />
2<br />
p(10)<br />
= 10 + 2⋅ 10 + 11<br />
p(10)<br />
= 100 + 20 + 11<br />
p(10)<br />
= 131<br />
4248d<br />
2<br />
px ( ) = x + 2x+ 11<br />
2<br />
p(<br />
− 8) = ( − 8) + 2 ⋅( − 8) + 11<br />
p(<br />
− 8) = 64 + ( − 16) + 11<br />
p(<br />
− 8) = 64− 16+ 11<br />
p(<br />
− 8) = 59<br />
4249b<br />
gz ( ) = 3z−z<br />
g(1)<br />
= 3 ⋅1−1 g(1)<br />
= 3 −1<br />
g(1)<br />
= 2<br />
4249d<br />
2<br />
gz ( ) = 3z−z<br />
g(<br />
− 5) = 3 ⋅( −5) −( −5)<br />
g(<br />
− 5) =−15−25 g(<br />
− 5) =−40<br />
2<br />
2<br />
2<br />
68
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