Level:
Project ID:
1003085501
Accepted:
1
Clonable:
0
Easy:
1
Decide which of the following functions are continuous at \( x = 1 \).
\[\begin{aligned} f_1(x)&=\frac{x^2+1}{x-1} \\
f_2(x)&=\sqrt{x-1} \\
f_3(x)&=\log x \\
f_4(x)&=\mathrm{tg}(x-1)
\end{aligned}\]
The only such functions are:
\( f_3 \), \( f_4 \)
\( f_2 \), \( f_3 \), \( f_4 \)
\( f_2 \), \( f_3 \)
\( f_3 \)