What is the normal vector of the plane represented by
1 x − 1 + 2 y − 2 + 3 z − 3 = 0 ?
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thanks helped alot
Multiplying through by 6 we get: 6 x − 6 + 3 y − 6 + 2 z − 6 = 0 ⇒ 6 x + 3 y + 2 x = 1 8
A normal vector to the plane a x + b y + c z = d is ( a , b , c ) so the answer is:
( 6 , 3 , 2 )
This comes to 6(x-1) + 3(y-2) + 2(z-3) = 0. Hence, the normal vector will be (6,3,2), meeting the plane at point (1,2,3)
6 6 ( x − 1 ) + 3 ( y − 2 ) + 2 ( z − 3 ) =0 so coefficient of x is 6, of y is 3 and of z is 2. so the normal vector will be (6,3,2).
LCM is 6, Denom of 1 means 6, 2 means 3 and 3 means 2. Corresponding multipliers of x,y and z represents normal vector.
multiplying by 6, we get, 6(x-1)+3(y-2)+2(z-3)=0 or, 6x-6+3y-6+2z-6=o or, 6x+3y+2z=18
now, the normal vector will be (a,b,c) i.e, (6,3,2).
.... where does the magic number 6 come from?
Y we multiply 6
taking the lcm of 1,2 and 3 we need to multiply x-1 by 6 y-2 by 3 and z-3 by 2 . then the denominator is sent to rhs and we get standard equation of plane from where we can find the normal vector
suppose we we write the general e question as 6x + 3y + 2z - 18 = 0 but the normal vector will be 6i + 3j + 2k and hence the coefficients of the normal vector will be (6,3,2)
Direction Ratio of given plane equal to DR's of normal of plane are 6,3,2
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The equation can be rewritten as ( ( x , y , z ) − ( 1 , 2 , 3 ) ) ⋅ ( 1 , 2 1 , 3 1 ) = 0
which means that the plane passes through ( 1 , 2 , 3 ) and ( 1 , 2 1 , 3 1 ) is a normal vector.
6 ( 1 , 2 1 , 3 1 ) = ( 6 , 3 , 2 ) is also a normal vector.