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प्रश्न
Find the slope of a line perpendicular to the foloowing line 4x + y = 7
उत्तर
When two lines are perpendicular to each other the product of their slope is -1.
i.e m1 x m2 = -1
4x + y = 7
y = -4x + 7
m1 = -4
Slope of required line (m2) = `(-1)/("m"_1) = 1/4`
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