EXERCICI 1: ���� C)

EXERCICI 2: ���� a), b) i c)

EXERCICI 3: ���� tot

EXERCICI 4: ���� a) i b)

EXERCICI 5: ���� a), b), c) i d)

EXERCICI 6: ���� 1) i 2)

EXERCICI 7: ���� 1) i 2)

EXERCICI 8: ���� a), b), c) i d)

EXERCICI 9: ���� d)

EXERCICI 10: ���� DEURES