Question

State whether the following statements are true or false. Give a Short proof or a counter-example in support of your answer.
a) The equation equation has not root in the interval [3, 5].
b) equation, where E is the shift operator and equation is the forward difference operator.
c) Every equation system of linear equations can be solved using the LU decomposition method.
d) For the data (2, 4), (1, 5), (3, 6) the Newton's divided difference f[x0, x1, x2] is equation.
e) The Newton-Raphson method cannot be used to find a cube root of a positive real number.

09 Jan 2026
Answer :
Word Count : 210
a) True – If the function (f(x)) is continuous on [3, 5] and the given equation does not change sign in this interval, by Bolzano’s theorem (Intermediate Value Theorem), it has no root there. Counter-example: (f(x) = x^2 + 1) has no root in [3, 5].
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