Answer: The whole test is 1.D 2.A 3.B
Explanation:
EDGE2021
Answer:
1) Puedes ir al partido de tenis el viernes en la noche? D) Tal vez
2) Quieres nadar una hora con Silvia y conmigo? B) No me gusta el agua
3) Cual es tu pasatiempo favorito? C) Ir al cine
4) Tienes tiempo tu? A) Estoy ocupado
Explanation:
<em>Answers translated to English for your understanding/Traduje las respuestas al inglés para su comprensión </em>
1) Can you go to the tennis match Friday night? D) Maybe
2) Do you want to swim for an hour with Silvia and me? B) I don't like water
3) What is your favourite pastime? C) To go to the cinema
4) Do you have time? A) I'm busy
I hope this helps!/ ¡Espero que esto te ayude!
Let A=ia1 + ja2 + ka3
B= ib1 +jb2 =kb3 and
C=ic1 + jc2 +kc3
B.C =b1c1 + b2c2 +b3c3 is a scaler and so
A.(B.C) = (b1c1 + b2c2 +b3c3)(ia1 +ja2 +ka3)
A.(B.C) = ia1b1c1 +ja2b2c2 +ka3b3c3 . . . . . . . . . . .(1)
A.B = a1b1 + a2b2 +a3c3 is a scaler and
(A.B).C = (a1b1 + a2b2 +a3c3)(ic1 + jc2 +kc3)
(A.B).C = ia1b1c1 + ja2b2c2 + ka3b3c3 . . . . . . . . . . (2)
RHS’s of (1) and (2) are identical and so
the LHS’s should be equal and hence it follows that
A.(B.C) = (A.B).C