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यदि `x = log_(a) (bc) , y = log_(b) (ac)` तथा `z = log_(c) (ab)` हो , तब निम्न प्रश्नो के उत्तर दीजिए । x + y + z का मान हैA. `log_(e) abc(log_(a) e + log_(b) e + log_(c) e) - 3`B. ` log_(e) abc (log_(e) a + log_(e) b + log_(e) c) - 3`C. ` log_(e) abc ( log_(abc) e) - 3 `D. इनमे से कोई नहीं |
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Answer» Correct Answer - A ` x + y + z = log_(a) (bc)+ (log)_(b)(ac)+log_(c)(ab)` ` = ((log b + log c))/(log a) + ((log a+ log c))/(log b)+((log a + log b))/(log c) ` ` = ((log abc)/(log a) -1) +((log abc)/(log b) -1) + ((log abc)/(log c) -1)` ` = log abc (log _(a) e + log_(b) e + log_(c)e) - 3` |
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