Find the Equation of the Line Tangent to the Graph $x = 1$

question 18

Essay

Find the equation of the line tangent to the graph of the given function at the point $x = 1$ .
​ $f ( x ) = \left( x ^ { 2 } + 2 \right) \left( x ^ { 3 } + x \right)$

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Definitions:

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