current new approximation approximation function f. This step is repeated forn = 0, 1, 2, . . . , until a termination condition is met 2 he discussed). We have derived the general step of Newton's method for approximating roots of a Newton's Method for Approximating Roots of f(x) 0 FASCED URE Chouse an initial approximation x as close to a root as possible. 01, 2,. . f(x,) f' (x,) п provided f'(x) 0. 3. End the calculations when a termination condition is met. QUICK CHECK 1 Verify that setting y = 0 in the equation y - f(x, )= f'(x,)(x - xn) and solving for x gives the formula for Newton's method. Applying Newton's method Approximate the roots of f(x)= x-5x + 1 (Figure 4.83) using seven steps of Newton's method. Use 4 as initial approximations. EXAMPLE 1 3 X 1, and xo -3, xo SOLUTION Noting that f'(x) = 3x-5, Newton's method takes the form f (x,) .3 5x, 1 1 2x3 п n 3x2 -5 3x2- 5 'n+1 п n п f'(x,) H0 where n 0, 1, 2, ... , and x is specified. With an initial approximation of e first approximation is Хо 2(-3)3 1 3x-5 3(-3)2 -5 2x0 1 -2.5 e second approximation is 2x- 1 2(-2.5)3 1 -2.345455. 2 .2
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
For example 1, how did they get 2X^3 - 1 in the numerator?
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