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Solution: 12x² + 3

Working:

General differentiation formular:  d/dx (axⁿ ) = an(x^n-1) 

So we multiply the coefficient (constant infront) of the x term...

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We use the factor theorem which states that (2x+1) is a factor of p(x) if and only if the root of (2x+1)=0 is also a root of p(x). The root of 2x+1=0 is x = -1/2 (-1 from both sides and then divide both s...

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