009A Sample Midterm 3, Problem 3

Let  $y={\sqrt {2x+5}},x\geq 0.$

(a) Use the definition of the derivative to compute   Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle {\frac {dy}{dx}}.}

(b) Find the equation of the tangent line to  $y=3{\sqrt {2x+5}}$  at  $(2,9).$

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