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Question
The graph of a polynomial y = f(x), shown in Fig. 2.18. Find the number of real zeros of f(x).
Solution
A real number a is a zero of polynomial `f(x)` if `f(a)=0`
In the above figure the curve intersects x-axis at one point and touches at one point
When a curve touches x-axis at one point, it means it has two common zeros at that point
Hence the number of real zeroes is 3 .
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