1. The problem is to find the basic derivative of a function, which is usually the easiest starting point in calculus.
2. The formula for the derivative of a function $f(x)$ is given by:
$$f'(x) = \lim_{h \to 0} \frac{f(x+h) - f(x)}{h}$$
This formula represents the rate of change or slope of the function at any point $x$.
3. Important rules for derivatives include:
- The derivative of a constant is 0.
- The power rule: $\frac{d}{dx} x^n = n x^{n-1}$.
- The sum rule: derivative of a sum is the sum of derivatives.
4. Example: Find the derivative of $f(x) = 3x^2 + 5x - 4$.
5. Apply the power rule to each term:
$$\frac{d}{dx} 3x^2 = 3 \times 2 x^{2-1} = 6x$$
$$\frac{d}{dx} 5x = 5$$
$$\frac{d}{dx} (-4) = 0$$
6. Combine the results:
$$f'(x) = 6x + 5 + 0 = 6x + 5$$
7. This derivative tells us the slope of the curve $f(x)$ at any point $x$.
This is a simple and fundamental derivative problem to start your exam confidently.
Basic Derivative C18F1B
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