Secant Method Disadvantage 3Bcc21
1. The problem asks to identify a disadvantage of the Secant Method compared to Newton's Method.
2. Recall the key characteristics:
- Newton's Method requires the derivative $f'(x)$.
- Secant Method approximates the derivative and does not require $f'(x)$.
- Newton's Method typically converges faster (quadratic convergence).
- Secant Method converges slower (superlinear but less than quadratic).
- Secant Method requires two initial guesses, Newton's requires one.
3. Analyze each option:
- (i) "It cannot be applied to non-linear functions." This is false; both methods apply to non-linear functions.
- (ii) "It requires the computation of the derivative $f'(x)$." False; Secant Method avoids direct derivative computation.
- (iii) "It converges slower than Newton's Method." True; Secant Method has slower convergence.
- (iv) "It always requires two initial guesses close to the root." True; Secant Method needs two initial points.
4. The question asks for a disadvantage compared to Newton's Method. Both (iii) and (iv) are disadvantages, but the standard recognized disadvantage is slower convergence.
Final answer: (iii) It converges slower than Newton's Method.