If the roots of the equation a(b - c)x^2...

If the roots of the equation `a(b - c)x^2 + b(c- a)x+ c(a-b)=0` are equal, then which of the following is true?
यदि समीकरण a(b - c)x^2 + b(c- a)x+ c(a-b)=0` के मूल बराबर है, तो निम्नलिखित में से कौन सा सही है?

A

`b = (a + c) // ac`

B

` 2 // b = (1 // a) + (1 // c)`

C

`2 b = (1 // a) + (1 // c)`

D

`abc = ab + bc + ca `

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The correct Answer is:

B

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