document.write( "Question 1140416: Find the instantaneous rate of change, using the definition, of 𝑓(𝑥) = 5𝑥^2 + 4𝑥 at 𝑥 = 3. \n" ); document.write( "

Algebra.Com's Answer #760931 by Boreal(15235) $\"\"$ $\"About$

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The derivative is f'(x)=10x+4 and at x=3, f'(x) =34. That is the slope of the curve at x=3. \n" ); document.write( "

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