Question 1163986
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The correct solution and the correct answer is


<pre>
    {{{(dy)/(dx)}}} = {{{5/(2*sqrt(5x+4))}}}.


Gradient at  x = 1  is   {{{5/(2*sqrt(5*1+4))}}} = {{{5/(2*sqrt(9))}}} = {{{5/(2*3)}}} = {{{5/6}}}.
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