Newton’s Method for Finding Solutions to Equations (VCE SSCE Mathematical Methods): Flashcards

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Newton's Method for Finding Solutions to Equations
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What Newton's method finds

Approximate solutions to f(x) = 0

Newton's method iterative formula

xn+1=xnf(xn)f(xn)x_{n+1} = x_n - \frac{f(x_n)}{f'(x_n)}

Critical condition for f(xn)f'(x_n) in Newton's method

Must not equal zero

Geometric feature in Newton's method

Tangent lines

Initial approximation symbol (Newton's method)

x0x_0

Meaning of xn+1x_{n+1} (Newton's method)

Improved/next approximation

Convergence speed of Newton's method

Typically very fast

Oscillating sequence (Newton's method)

Sequence bouncing between values, never converging

Effect when f(xn)=0f'(x_n) = 0 (Newton's method)

Tangent horizontal; method terminates

Factor affecting Newton's convergence speed

Choice of starting point

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