Given that, f (x) = x³ + 3x² + 5x + 9, %3D (i) Show that there is at least one root in the interval [-3,–2] (ii) Using the Newton Raphson method, taking x1 = -2.5, find x2 correct to 3 decimal places.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Question 4
Given that, f(x) = x³ + 3x? + 5x + 9,
(i) Show that there is at least one root in the interval [-3, –2]
(ii) Using the Newton Raphson method, taking x = -2.5, find x2 correct to 3 decimal places.
The 4th term of a GP is –96 and the 7th term is 768.
(i) Find the first term and the common ratio.
(ii) Find the 9th term.
Transcribed Image Text:Question 4 Given that, f(x) = x³ + 3x? + 5x + 9, (i) Show that there is at least one root in the interval [-3, –2] (ii) Using the Newton Raphson method, taking x = -2.5, find x2 correct to 3 decimal places. The 4th term of a GP is –96 and the 7th term is 768. (i) Find the first term and the common ratio. (ii) Find the 9th term.
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