Consider the function $f:\left[\frac{1}{2}, 1\right] \rightarrow \mathbb{R}$ defined by $f(x)=4 \sqrt{2} x^3-3 \sqrt{2} x-1$. Consider the statements (I) The curve $y=f(x)$ intersects the $x$-axis exactly at one point. (II) The curve $y=f(x)$ intersects the $x$-axis at $x=\cos \frac{\pi}{12}$. Then

Question

Consider the function $f:\left[\frac{1}{2}, 1\right] \rightarrow \mathbb{R}$ defined by $f(x)=4 \sqrt{2} x^3-3 \sqrt{2} x-1$. Consider the statements

(I) The curve $y=f(x)$ intersects the $x$-axis exactly at one point.

(II) The curve $y=f(x)$ intersects the $x$-axis at $x=\cos \frac{\pi}{12}$.

Then

Both (I) and (II) are correct.

Only (I) is correct.

Both (I) and (II) are incorrect.

Only (II) is correct.

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