1.

If `(b-c)/a+(a+c)/b+(a-b)/c=1`and `a-b+c!=0` then which of the following is correct?A. `1/c=1/a+1/b`B. `1/a=1/b+1/c`C. `1/b=1/a-1/c`D. `1/b=1/a+1/c`

Answer» Correct Answer - B
`(b-c)/a+(a+c)/b+(a-b)/0=1`
`a-b+c!=0`
Let `b=c`
`:. (b-b)/a+(a+b)/b+(a-b)/b=1`
`implies 0+a/b+1+a/b=1=1`
`implies a/b+1/b=1`
`implies 1/b+1/b=1/a`
We take `b=c`
`:. 1/b+1/c=1/a`


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