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Mathematics

If log3 27=x\text{log}_{\sqrt{3}} \space 27 = x, then the value of x is

  1. 3

  2. 4

  3. 6

  4. 9

Logarithms

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Answer

Given,

x=log3 27=log10 27log10 3=log10 33log10 312=3log10 312log10 3=312=3×2=6.\Rightarrow x = \text{log}{\sqrt{3}} \space 27 \\[1em] = \dfrac{\text{log}{10} \space 27}{\text{log}{10} \space \sqrt{3}} \\[1em] = \dfrac{\text{log}{10} \space 3^3}{\text{log}{10} \space 3^{\dfrac{1}{2}}} \\[1em] = \dfrac{3\text{log}{10} \space 3}{\dfrac{1}{2}\text{log}_{10} \space 3} \\[1em] = \dfrac{3}{\dfrac{1}{2}} \\[1em] = 3 \times 2 = 6.

Hence, Option 3 is the correct option.

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