For a polynomial $f(x)$, the graph of $y=f(x)$ is given. The number of zeroes of $f(x)$ in the graph will be:
Step 1: Definition of zero of a polynomial
Zeroes of a polynomial are the $x$-coordinates where the graph of $y=f(x)$ intersects the $x$-axis, i.e., where $f(x)=0$.
Step 2: Observe the given graph
From the graph, the curve cuts the $x$-axis at three distinct points.
Step 3: Count the zeroes
Since there are three points of intersection with the $x$-axis, the number of zeroes of $f(x)$ is $3$.
\[
\boxed{\text{Number of zeroes} = 3}
\]
Find the zeroes of the following quadratic polynomials and verify the relationship between the zeroes and the coefficients.
(i) \(x^2 – 2x – 8\) (ii) \(4s^2 – 4s + 1\) (iii) \(6x^2 – 3 – 7x\) (iv) \(4u^2 + 8u\) (v) \( t^2 – 15\) (vi) \(3x^2 – x – 4\)
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.