AP EAMCET · Maths · Pair of Lines
If the lines represented by the equation are real then the value of ' ' lies in the interval
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
As we know, ax2+2hxy+by2=0, represents a pair of straight lines when h2-ab≥0 So, 2x2-pxy+2y2=0 represent pair of straight lines iff p24-4≥0 ⇒ p-4p+4≥0 p∈-∞,-4∪4,∞
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