Which of the following is definitely false?
The graph of the $f(x)$ function is given above.
According to this graph, which of the following is definitely false?
A) $\lim_{x\to -2}f(x)=1$
B) $\lim_{x\to 2^+}f(x)+\lim_{x\to 0}f(x)=4$
C) $f(x)$ is defined at $x=2$
D) $\lim_{x\to 2^-}f(x)+\lim_{x\to 0^-}f(x)=7$
E) $\lim_{x\to -2}f(x)+f(2)=-1$
My attempts:
At first, I couldn't understand the difference between false and definitely false.
A) is correct. Because, $\lim_{x\to -2^+}f(x)=\lim_{x\to -2^-}f(x)=1$.
B) I get, $\lim_{x\to 2^+}f(x)+\lim_{x\to 0}f(x)=1+2=3$
C) is correct. Because, it is black for the circle.
D) I get
$\lim_{x\to 2^-}f(x)+\lim_{x\to 0^-}f(x)=5+2=7$
E) I get
$\lim_{x\to -2}f(x)+f(2)=1+1=2$.
Thus, several options are definitely false. ( B and E). Where am I doing wrong?
Checking your answers:
A) Correct, it looks true.
B) Correct, it is definitely false.
C) Correct, it looks true.
D) Correct, it looks true.
E) Correct, it is definitely false.
Looks good.