Question

verify
x =2/3 y=-5/6 z=-7/8

​

Answer 1

Answer:

(a) x×(y×z)

=1×(

2

−1

×

4

1

)

=1×(

8

−1

)

=

8

−1

(x×y)×z

=(1×

2

−1

)×

4

1

=

2

−1

×

4

1

=

8

−1

So x×(y×z)=(x×y)z

(b)x×(y×z)=

3

2

×(

7

−3

×

2

1

)

=

3

2

×

14

−3

=

42

−6

(x×y)×z=(

3

2

×

7

−3

)

=

21

−6

×

2

1

=

42

−6

=

2

−6

So, x×(y+z)=(x×y)×z