Question

Please help me solve the following limit (click to see)

Answer 1

\[\lim_{x \rightarrow 4^-}\frac{3-x}{x^2-2x-8}\]

Answer 2

\[\lim_{x \rightarrow 4^-}\frac{3-x}{x^2-2x-8}\]

Answer 3

\[\frac{ -(x-3) }{ x^2-2x-8 }\]
factorise now the denominator

Answer 4

(x+2)(x-4)

Answer 5

\[4^-\]
means from the left so
what does the diagram say about y when x is almst 4 approaching from the left