यदि xayb = (x - y)a+b है, तो का मान किसके बराबर है?

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Option 4 : 0
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संकल्पना:

  • ​log x + log y = log (xy)
  • log (xa) = a log (x)

 

गणना:

दिया गया है: xayb = (x - y)a+b

दोनों पक्षों पर log लेने पर,

a logx + b logy = (a+b) log(x - y)

अब, अवकलज लेने पर,

अतः विकल्प (4) सही है। 

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