If A(1, 2, 3), B(-1, -1, -1) be the points, then the distance AB is
[MP PET 2001; Pb. CET 2001]

$\sqrt{5}$

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$\sqrt{21}$

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$\sqrt{29}$

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None of these

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Solution

The correct option is C
$\sqrt{29}$

$A B = \sqrt{(- 1 - 1)^{2} + (- 1 - 2)^{2} + (- 1 - 3)^{2}}$
$A B = \sqrt{(4 + 9 + 16} = \sqrt{29} .$

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If A(1, 2, 3), B(-1, -1, -1) be the points, then the distance AB is [MP PET 2001; Pb. CET 2001]

The correct option is C √29 AB=√(−1−1)2+(−1−2)2+(−1−3)2 AB=√(4+9+16=√29.

If A(1, 2, 3), B(-1, -1, -1) be the points, then the distance AB is
[MP PET 2001; Pb. CET 2001]

The correct option is C
$\sqrt{29}$

$A B = \sqrt{(- 1 - 1)^{2} + (- 1 - 2)^{2} + (- 1 - 3)^{2}}$
$A B = \sqrt{(4 + 9 + 16} = \sqrt{29} .$