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What is 1/(bc(a-b)(a-c)) + 1/(ca(b-c)(b-...

What is `1/(bc(a-b)(a-c)) + 1/(ca(b-c)(b-a)) + 1/(ab(c-a)(c-b))` equal to?

A

1.a+b+c

B

2.3

C

3.ab + bc+ ca

D

4.0

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Knowledge Check

  • ab(a-b)+bc(b-c)+ca(c-a) is equal to

    A
    `(a+b)(b-c)(c-a)`
    B
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    a+b+c
    B
    abc
    C
    0
    D
    None of these

  • (1)/(1+log_(a) bc) + (1)/(1+log_(b)ca) + (1)/(1+ log_(c ) ab) is equal to

    A
    0
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