Question
If be any point on a line then the range of for which the point ' P ' lies between the parallel lines x+2y=1 and 2x+4y=15 is
- None of these
Hint:
When a point is existing in between two lines the product of it's values with respect to the point will always gives negative. Because, the the property of a line with respect to point changes for two lines.
The correct answer is:
Given That:
If be any point on a line then the range of for which the point ' P ' lies between the parallel lines x+2y=1 and 2x+4y=15 is
>>> When a point lies in between the lines. Then:
L11.L22 <0
>>> L11 becomes: (1+)+2() -1
>>> L22 becomes :
>>> Therefore:
L11.L22 < 0
((1+)+2() -1).() < 0
>>> This gives range as .
((1+)+2() -1).() < 0
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