E-CE03 · A curve with a radical gradient
For \(\displaystyle x>-\frac12\), a curve has \(\displaystyle f^{\prime}(x)=\frac6{\sqrt{2x+1}}\) and \(f(4)=11\).
Find f(x).
Find the point on the curve with ordinate 5.
Find the normal at that point.
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