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MAT135H5_F25_ALL SECTIONS 2.4 Preparation Check
Multiple dropdown selections
Consider the function ๐ ( ๐ฅ ) = { ๐ฅ 2 + 1 ๐ ๐ ๐ฅ < 2 3 ๐ ๐ ๐ฅ = 2 7 โ ๐ฅ ๐ ๐ ๐ฅ > 2 .ย We aim to find out if ๐ ( ๐ฅ ) has a discontinuity at ๐ฅ = 2 , and if so, of what type. In order to do that, first find the following information: ๐ ( 2 ) ย = [ Select ] 5 3 2 7 lim ๐ฅ โถ 2 โ ๐ ( ๐ฅ ) ย = [ Select ] 7 3 2 5 lim ๐ฅ โถ 2 + ๐ ( ๐ฅ ) ย = [ Select ] 5 7 2 3 Is ๐ ( ๐ฅ ) continuous or discontinuous at ๐ฅ = 2 ? [ Select ] discontinuous continuous If ๐ ( ๐ฅ ) is discontinuous at ๐ฅ = 2 , what type of discontinuity is it? [ Select ] f is continuous An infinite discontinuity A removable discontinuity A jump discontinuity ย
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Step-by-Step Analysis
We are given a piecewise function f(x):
- f(x) = x^2 + 1 if x < 2
- f(x) = 3 if x = 2
- f(x) = 7 โ x if x > 2
and several prompts to fill in for x = 2. First, restating the information:
- f(2) = [Select] corresponds to the actual value of the function at x = 2, which is 3 according to the definition.
- lim_{x โ 2โป} f(x) = [Select] is the left-hand limit as x approaches 2 from below. Since x < 2 uses x^2 + 1, this tends to 2^2 + 1 = 5, so the left-hand limit is 5.
- lim_{x โ 2โบ} f(x) = [Select] is the right-hand limit as x approaches 2 fr......Login to view full explanationLog in for full answers
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Similar Questions
Suppose that with a certain phone company, an international long distance phone call from Canada to Brazil costs $0.90 for the first minute (up to and including 60 seconds), plus $0.50 for each additional minute or part of a minute. Note: "Part of a minute" means that if a new minute is started even just by one second, a full minute is charged. For example, a 5 min 1 sec phone call costs the same as a 5 min 50 sec phone call and the same as a 6 min 0 sec phone call. ย Suppose ๐ถ ( ๐ก ) is the function that gives the cost of making a ๐ก minute long phone call.ย On a piece of paper, sketch a graph showingย ๐ถ ( ๐ก ) (with ๐ถ on the ๐ฆ -axis and ๐ก on the ๐ฅ -axis). Then use your graph to evaluate each of the following: (Write DNE for undefined.) ๐ถ ( 2.5 ) = [ Select ] DNE 1.9 1.4 2.4 2.9 ๐ถ ( 4 ) = [ Select ] 3.4 1.9 2.9 2.4 DNE lim ๐ฅ โ 3.1 ๐ถ ( ๐ก ) = [ Select ] 1.9 1.4 2.9 2.4 DNE lim ๐ฅ โ 4 โ ๐ถ ( ๐ก ) = [ Select ] 2.4 1.4 2.9 1.9 DNE lim ๐ฅ โ 4 + ๐ถ ( ๐ก ) = [ Select ] DNE 2.9 2.4 3.4 1.9 lim ๐ฅ โ 4 ๐ถ ( ๐ก ) = [ Select ] 1.9 2.9 DNE 3.4 2.4
Consider this graph of the functionย ๐ ( ๐ฅ ) . Which of the following statements are true and which are false?ย lim ๐ฅ โ 3 โ ๐ ( ๐ฅ ) = lim ๐ฅ โ 3 + ๐ ( ๐ฅ ) [ Select ] False True lim ๐ฅ โ 1 ๐ ( ๐ฅ ) = ๐ ( 1 ) ย ย [ Select ] True False ๐ ( ๐ฅ ) ย has a vertical asymptote at ๐ฅ = 4 . [ Select ] False True ๐ ( ๐ฅ ) ย has a vertical asymptote at ๐ฅ = 6 ย . [ Select ] False True lim ๐ฅ โ 4 โ ๐ ( ๐ฅ ) = lim ๐ฅ โ 4 + ๐ ( ๐ฅ ) [ Select ] False True lim ๐ฅ โ 4 ๐ ( ๐ฅ ) = โ [ Select ] True False lim ๐ฅ โ 6 ๐ ( ๐ฅ ) = โ [ Select ] False True The limit lim ๐ฅ โ 4 ๐ ( ๐ฅ ) exists, but lim ๐ฅ โ 6 ๐ ( ๐ฅ ) ย does not exist. [ Select ] False True
Consider this graph of the functionย ๐ ( ๐ฅ ) . Which of the following statements are true and which are false?ย lim ๐ฅ โ 3 โ ๐ ( ๐ฅ ) = lim ๐ฅ โ 3 + ๐ ( ๐ฅ ) [ Select ] False True lim ๐ฅ โ 1 ๐ ( ๐ฅ ) = ๐ ( 1 ) ย ย [ Select ] False True ๐ ( ๐ฅ ) ย has a vertical asymptote at ๐ฅ = 4 . [ Select ] True False ๐ ( ๐ฅ ) ย has a vertical asymptote at ๐ฅ = 6 ย . [ Select ] False True lim ๐ฅ โ 4 โ ๐ ( ๐ฅ ) = lim ๐ฅ โ 4 + ๐ ( ๐ฅ ) [ Select ] True False lim ๐ฅ โ 4 ๐ ( ๐ฅ ) = โ [ Select ] False True lim ๐ฅ โ 6 ๐ ( ๐ฅ ) = โ False The limit lim ๐ฅ โ 4 ๐ ( ๐ฅ ) exists, but lim ๐ฅ โ 6 ๐ ( ๐ฅ ) ย does not exist. [ Select ] True False
MTH1010_09_10_3
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