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Find the distance between the planes ve...

Find the distance between the planes ` vec(r) * ( 2 hat(i) - hat(j) + 3 hat(k))` = 4 and ` vec(r) * ( 6 hat(i) - 3 hat(j) + 9 hat(k))` + 13 = 0

A

`(5)/( 3( sqrt(14)))`

B

`(10)/( 3( sqrt(14)))`

C

`(10)/( 3( sqrt(14)))`

D

None of these

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