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Question

If a, b, c are real numbers, then the value of a1b.b1c.c1a is

A
abc
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B
abc
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C
1abc
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D
1
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Solution

The correct option is D 1
a1bb1cc1a

=(a1b)12(b1c)12(c1a)12

=a12b12b12c12c12a12

=a12+12b1212c1212

=a0b0c0

=1×1×1=1

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