Question

If you solve this problem I will give you 15 coins

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

We have,

2x+5y+7=0

Let, the plane=2,5,0

Equation of xy-plane z=0

So, ratio of normal to the plane are 0,0,1

∴a

1

×a

2

+a

1

×a

2

+a

1

×a

2

=2×0+5×0+0×7

=0+0+0

=0

Hence, this is answer.