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Assertion (A) : The normals to the plane...

Assertion (A) : The normals to the planes `x-lambday+z=1, 3x+2y-lambdaz+1=0` are perpendicular to each other if `lambda+1=0`.
Reason (R ) : If the planes `a_(1)x+b_(1)y+c_(1)z+d_(1)=0,a_(2)x+b_(2)y+c_(2)z+d_(2)=0` are perpendicular to each other then `a_(1)a_(2)+b_(1)b_(2)+c_(1)c_(2)=0`

A

Both (A) and (R) are true R is correct reason of A

B

Both (A) and (R) are true R is not correct reason of A

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Text Solution

Verified by Experts

The correct Answer is:
D
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