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Log X = 2m - N , Log Y = N - 2m and Log Z = 3m - 2n , Find in Terms of M and N, the Value of Log (Xx^2y^3 ) /(Z^4) - Mathematics

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प्रश्न

Given log x = 2m - n , log y = n - 2m and log z = 3m - 2n , find in terms of m and n, the value of log `(x^2y^3 ) /(z^4) `.

योग

उत्तर

Given log x = 2m - n, log y = n - 2m, log z = 3m - 2n.

Given : log `(x^2y^3)/(z^4)`

We know that log(a/b) = log a - log b.

⇒ log `(x^2y^3)` - log `(z^4)`

We know that log(ab) = log a + log b

⇒ log `(x^2)` + log `(y^3)` - log `(z^4)`

⇒ 2 log x + 3 log y - 4 log z

⇒ 2(2m - n) + 3(n - 2m) - 4(3m - 2n)

⇒ 4m - 2n + 3n - 6m - 12m + 8n

⇒ -14m + 9n

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Expansion of Expressions with the Help of Laws of Logarithm
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Logarithms - Exercise 8 (C) [पृष्ठ १०८]

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सेलिना Concise Mathematics [English] Class 9 ICSE
अध्याय 8 Logarithms
Exercise 8 (C) | Q 10 | पृष्ठ १०८
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