111. The number of tangent points of the function $f(x) = [x^2]$ with the rule $f(x) = [x^2]$, on the interval $[-1, 2]$, is which of the following? (4) $6$ (3) $5$ (2) $4$ (1) $2$
\textbf{111.} The number of tangent points of the function $f(x) = [x^2]$ with the rule $f(x) = [x^2]$, on the interval $[-1, 2]$, is which of the following?
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(4) $6$ \hfill (3) $5$ \hfill (2) $4$ \hfill (1) $2$
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