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matriks refleksi thdp titik asal (0,0) -->
matriks refleksi thdp garis y = -x -->
B(p,r) --> B'(9,-6)
maka, titik asal--> B(-6,9)
7) jumlahkan dgn aturan vektor
a)
b)
c)
d)
e)
semoga sedikit membantu ya :)