AP EAMCET · Maths · Straight Lines
Let and be distinct and none of them is equal to . If the lines and are concurrent, then the value of is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
We know that, three lines a1x+b1y+c1=0 a2x+b2y+c2=0 a3x+b3y+c3=0 are concurrent if a1b1c1a2b2c2a3b3c3=0 Therefore, given lines are concurrent if 1aab1bcc1=0 Expanding along R1, we have 11-bc-ab-bc+abc-c=0 or ab+bc+ca=1+2abc ...i Now, aa-1+bb-1+cc-1…
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