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Question

Given f(x) = g(x).h(x). If g(x) and h(x) are continuous in a given interval then f(x) will be in the same interval.

A
continuous
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B
discontinuous
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C
constant
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D
increasing
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Solution

The correct option is A continuous

The proof of the properties are proved using ϵδ method which will be introduced in higher mathematics.

Here we assume very small neighborhood δ and ϵ for the values x and functions f, g. then we see if the functions f+g,fg,f.g,fg also comes within a small neighborhood in terms of ϵ. If it comes like that then the resultant function is also continuous.


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