Question

(-4xyz) x (-2 x2y3z4 )

Answer 1

Answer:

Consider

3x+4y+5z=6 ...(i)

2x+3y+4z=5 ...(ii)

x+2y+3z=4 ...(iii)

Therefore,

∣

∣

∣

∣

∣

∣

∣

∣

3

2

1

4

3

2

5

4

3

∣

∣

∣

∣

∣

∣

∣

∣

=3(9−8)−4(6−4)+5(4−3)

=3+5−(4×2)

=8−8

=0

Hence the above set of equations have infinitely number of planes.

Answer By

Step-by-step explanation:

hope it helps

Answer 2

Answer:

ANSWER

Using multi-nomial theorem we get coefficient of

x

p

y

m

z

l

in (ax+by+cz)

n

=

p!m!l!

n!(a

p

b

m

c

l

)

...(i)

Substituting the value of n,m,l,p from above question to equation (i) we get,

coefficient of x

2

y

3

z

4

in (ax−by+cz)

9

=

2!3!4!

9!(a

2

(−b)

3

c

4

)

=−(140)(9)(a

2

b

3

c

4

)

=−1260(a

2

b

3

c

4

)

hope it helps I kn its not perfect but that's how I can write in a tab sorry