Determine the following$$ limits$,$ using

infinity

or

minus$$infinity

when$$ appropriate, or state that they do not exist.

a$.$ ModifyingBelow lim With x right arrow $1$ Superscript plus StartFraction $4$ Over x minus $1$ EndFractionlimx$1+4$x$1$

b$.$ ModifyingBelow lim With x right arrow $1$ Superscript minus StartFraction $4$ Over x minus $1$ EndFractionlimx$14$x$1$

c$.$ ModifyingBelow lim With x right arrow $1$ StartFraction $4$ Over x minus $1$ EndFraction