# 1.2.3b Function Example 2 and 3

Example 2

Function f is defined as $f:x\to \frac{5}{2x-1},x\ne k$

Find the value of k.

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Example 3

Given $g:x\to \frac{3x-5}{2x+7}$

Function g is defined for all values of x except x=a. Find the value of a.
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