If the distance between planes `4x-2y-4z+1=0` and `4x-2y-4z+d=0` is `7`, then d is :

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Q 1720680511.     If the distance between planes `4x-2y-4z+1=0` and `4x-2y-4z+d=0` is `7`, then d is :
JEE 2014 Mains Paper 2
A

`41` or `-42`

B

`42` or `-43`

C

`-41` or `43`

D

`-42` or `44`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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