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प्रश्न
Show that lines x – 2y – 7 = 0 and 2x − 4y + 15 = 0 are parallel to each other
उत्तर
Let m1 be the slope of the line x – 2y – 7 = 0.
∴ m1 = `(-"coefficient of x")/"coefficient of y" = (-1)/(-2) = 1/2`
Let m2 be the slope of the line 2x − 4y + 15 = 0 .
∴ m2 = `(-"coefficient of x")/"coefficient of y" = (-2)/(-4) = 1/2`
Since m1 = m2,
the given lines are parallel to each other.
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