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MULO-A Algebra 1944 Algemeen

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(1)

Uitwerkingen examen Algebra MULO-A 1944 Algemeen

Opgave 1

2 2 2 2 2 2 4 21 72 4 20 25 2 9 35 2 23 45 4 25 x x x x x x x x x x x               (x7)

3

(2 5)( 7) x x x    (x9)  ( 8) ( 9 x x   (2 5)( 2 5 )(2 5) x x x          ) (2x5)( 2x )5 

3

( 8) 2 5 (2 5) (2 5) 2 5 x x x x x x            2x5 2x5 2x5  2x5 1

Opgave 2

45 3 5 20 2 5 12 2 3 27 3 3           2( 5 3 10 6 10 6 45 20 12 27 3 5 2 5 2 3 3 3            ) 5 3  2.

2 1 2 1 2 16 4 15 16 2 60 10 6 10 6 125 5 5 80 4 5 125 80 12 5 3 12 3                       1 2 2( 5 3 16 4 15 10 6 125 80 12 5 3      ) 5 3  2, dus vinden we 1 2 10 6 16 4 15 2 2 0 45 20 12 27 125 80 12      

Opgave 3

Stel de persoon koopt x hl aardappelen à f 3,60, dit kost f 3,6x en y hl aardappelen à f 4,50, kosten f 4,5y. Voor de totale kosten vinden we dus 3,6 + 4,5x y43236x45y4320

4x5y480(1).

Voor de verkoop geldt

x y

4, 4 432 47,6  4, 4x4,4y479,644x44y4796  x y 109(2). Uit (1) en (2) volgt 4 5 480 4 5 480 4(109 ) 5 480 436 4 5 480 44 109 109 x y x y y y y y y x y x y                       en vinden we x65.

(2)

De persoon kocht dus 65 hl aardappelen à f 3,60 en 44 hl aardappelen à f 4,50.

Opgave 4

Noem de drie getallen x, y en z.

Nu geldt y x 6 en y z: 2 : 32z3yen x2y2z2 504. We vinden dus 2 2 2 2 2 2 2 2 6 6 2 3 4 9 505 4 4 4 2016 y x x y z y z y x y z x y z                  2 2 2 2 2 2 4(y6) 4y 9y 20164(y 12y36) 4 y 9y 2016 2 2 2 2 4y 48y144 4 y 9y 201617y 48y1872 0  2 1,2 48 ( 48) 4(17)( 1872) 48 129600 48 360 12 34 34 34 y           y , dus x6en z18 .

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