1.

यदि `(2+a)/a+(2+b)/b+(2+c)/c=4`, तो `(ab+bc+ca)/(abc)` का मान क्या है?A. 2B. 1C. 0D. `1/2`

Answer» Correct Answer - D
`(2+a)a+(2+b)/b+(2+c)/c=4`
`(2bc+abc+2ac+abc+2ab+abc)/(abc)=4`
`(2(bc+ab+ca))/(abc)+(3abc)/(abc)=4`
`(2(bc+ab+ca))/(abc)+3=4`
`(ab+bc+ca)/(abc)=1/2`


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