Let f ( x ) = x 4 − 1 x 2 − 1 f o r x ≠ − 1 , 1 . a. Sketch the graph of f . b. Is it possible to find values k 1 and k 2 such that f ( − 1 ) = k and f ( 1 ) = k 2 , and that makes f(x) continuous for all real numbers? Briefly explain.
Let f ( x ) = x 4 − 1 x 2 − 1 f o r x ≠ − 1 , 1 . a. Sketch the graph of f . b. Is it possible to find values k 1 and k 2 such that f ( − 1 ) = k and f ( 1 ) = k 2 , and that makes f(x) continuous for all real numbers? Briefly explain.
b. Is it possible to find values k1and k2such that
f
(
−
1
)
=
k
and
f
(
1
)
=
k
2
, and that makes f(x) continuous for all real numbers? Briefly explain.
During busy political seasons, many opinion polls are conducted. In apresidential race, how do you think the participants in polls are generally selected?Discuss any issues regarding simple random, stratified, systematic, cluster, andconvenience sampling in these polls. What about other types of polls, besides political?
Elementary Statistics: Picturing the World (7th Edition)
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