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If the lines (1 -x )/(3) = ( 7y - 14)/(2...

If the lines `(1 -x )/(3) = ( 7y - 14)/(2 lamda) = (z - 3)/(2) "and" (7 - 7x)/(3lamda) = (y - 5)/(1) = ( 6 - z ) /(5)` are at right angle, then the value of `lamda` is

A

`bar(r) = (2hati - hatj + 2hatk) + lamda ( hati + 2 hatj + 3hatk ) `

B

`bar(r) = (-(1)/(3)hati + (1)/(3)hatj - hat(k)) + lamda (hati + 2hatj + 3hatk ) `

C

`bar(r) = ((1)/(3)hati - (1)/(3)hatj + hat(k)) + lamda (hati + 2hatj + 3hatk ) `

D

`bar(r) = (-hati - hatj + hat(k)) + lamda (hati + 2hatj + 3hatk ) `

Text Solution

Verified by Experts

The correct Answer is:
(b) (70)/(11)
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