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If the lines x + y + 1 =0 , 4x + 3y + 4...

If the lines ` x + y + 1 =0 , 4x + 3y + 4 =0 ` and ` x+ alpha y + beta =0 ` , where ` alpha^(2) + beta^(2) = 2 `, are concurrent then :

A

` alpha = 1 , beta = -1 `

B

` alpha = 1 , beta = pm 1 `

C

` alpha = -1 , beta = pm 1 `

D

` alpha = pm 1 , beta = 1 `

Text Solution

Verified by Experts

The correct Answer is:
D
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