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Find a root of x4−x3+10x+7=0 correct up to three decimal places between −2 and −1 by Newten Raphson method.
1 Answer
written 2.9 years ago by | • modified 2.9 years ago |
Solution:
⇒f(x)=x4−x3+10x+7=0
The root lies between −2 and −1,
Let x0=−2
f′(x)=4x3−3x2+10
By the Newton - Raphson method,
xn+1=xn−f(xn)f′(xn)
f(x0)=f(−2)=11
f′(x0)=f′(−2)=−34
∴x1=x0−f(x0)f(x0)=−2−11(−34)
⇒x1=−1.6765
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