Question:easy

The graph of \(y = f(x)\) is shown in the figure for some polynomials \(f(x)\). The number of zeroes for the polynomials is

Show Hint

Always look strictly at the x-axis. Intersections with the y-axis do not count towards the real zeroes of \(y = f(x)\).
Since the curve lies entirely in the upper half-plane (above the x-axis), the number of real roots is instantly 0.
  • 0
  • 4
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Show Solution

The Correct Option is A

Solution and Explanation

Step 1: Recall what a zero of a polynomial looks like on a graph.
A zero of $f(x)$ is a value of $x$ where the graph actually meets the x-axis, that is, where $y = 0$. Counting zeroes graphically just means counting these crossing or touching points.
Step 2: Read the graph carefully.
The curve rises and falls in a wave pattern, but at no point does it come down to touch or cross the horizontal axis. It stays entirely above the x-axis throughout.
Step 3: Translate this into a statement about f(x).
If the graph never reaches $y = 0$, it means $f(x) > 0$ for every real $x$ shown. There is no real input that makes the output zero.
Step 4: Conclude the count of zeroes.
Since the graph does not intersect the x-axis anywhere, the polynomial has no real zeroes.
\[ \boxed{0} \]
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