If $$ \ {xy\over x+y}= a, $$ $${xz\over x+z}=b $$ and $$ {yz\over y+z} =c $$ where a, b, c are all non – zero numbers, then x equals to
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Q:
If $$ \ {xy\over x+y}= a, $$ $${xz\over x+z}=b $$ and $$ {yz\over y+z} =c $$ where a, b, c are all non – zero numbers, then x equals to
- 1$$ 2abc\over {ab+bc-ac} $$false
- 2$$ 2abc\over {ab+ac-ac} $$false
- 3$$ 2abc\over {ac+bc-ab} $$true
- 4$$ 2abc\over {ac+bc-ac} $$false
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