Question:

If $\log_{\sin \frac{\pi}{6}} \left\{\frac{\left|z-2\right| + 3 }{3\left|z - 2\right| - 1 }\right\}>1 $ , then

Updated On: Jul 28, 2022
  • $|z - 2| > 7 $
  • $|z - 2| < 7 $
  • $|z - 2| < 3 $
  • $|z - 2| < 6 $
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The Correct Option is A

Solution and Explanation

We have, $ \log _{\sin \frac{\pi}{6}}\left\{\frac{|z-2|+3}{3|z-2|-1}\right\}>\,1$ $\Rightarrow \, \log _{1 / 2}\left\{\frac{|z-2|+3}{3|z-2|-1}\right\}>\,1 $ $\therefore$ Here, base of log is less than $1 $ i.e., $\frac{1}{2}\,7$
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Concepts Used:

Exponential and Logarithmic Functions

Logarithmic Functions:

The inverses of exponential functions are the logarithmic functions. The exponential function is y = ax and its inverse is x = ay. The logarithmic function y = logax is derived as the equivalent to the exponential equation x = ay. y = logax only under the following conditions: x = ay, (where, a > 0, and a≠1). In totality, it is called the logarithmic function with base a.

The domain of a logarithmic function is real numbers greater than 0, and the range is real numbers. The graph of y = logax is symmetrical to the graph of y = ax w.r.t. the line y = x. This relationship is true for any of the exponential functions and their inverse.

Exponential Functions:

Exponential functions have the formation as:

f(x)=bx

where,

b = the base

x = the exponent (or power)