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प्रश्न
Find the distance between the following pairs of points:
(–1, 3, –4) and (1, –3, 4)
उत्तर
The distance PQ between the points P(- 1, 3, -4) and Q(1, -3, 4) is
PQ = `sqrt((1 + 1)^2 + (-3 -3)^2 + (4 + 4)^2)`
= `sqrt((2)^2 + (-6)^3 + (8)^2)`
= `sqrt(4 + 36 + 64)`
= `sqrt104`
= `2sqrt26`
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