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प्रश्न
Select the correct option from the given alternatives:
Let a, b, c be distinct non-negative numbers. If the vectors `"a"hat"i" + "a"hat"j" + "c"hat"k" , hat"i" + hat"k" "and" "c"hat"i" + "c"hat"j" + "b"hat"k"` lie in a plane, then c is
विकल्प
the arithmetic mean of a and b
the geometric mean of a and b
the harmonic man of a and b
0
उत्तर
the geometric mean of a and b
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