What is the slope of the tangent to y = x^2 + 3x - 1 at x = 2?
Correct answer: C. 7
- A. 5
- B. 6
- C. 7
- D. 8
Explanation
Differentiate the function to obtain dy/dx = 2x + 3. Substituting x = 2 gives a tangent slope of 7.
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About Differentiation and Optimisation
Differentiation covers gradients, standard derivative rules, the product and quotient rules, the chain rule, stationary points and rates of change. Optimisation uses first and second derivatives to classify maxima and minima, while applications include tangent and normal lines, marginal quantities and related rates.
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