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MAT137Y1 Y LEC (All Lecture Sections) Pre-Class Quiz 15(2.21 and 2.22)

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Determine the following statements are True or False. 1) There is no solution of ๐‘’ ๐‘ฅ + ๐‘’ โˆ’ ๐‘ฅ 2 = 2 on [-2,2]. [ Select ] True False 2) Let f be a continuous function on [0,1] such that 0 < ๐‘“ ( ๐‘ฅ ) < 1 for all ๐‘ฅ โˆˆ [ 0 , 1 ] . We can conclude that there exists a point ๐‘Ž โˆˆ [ 0 , 1 ] such that ๐‘“ ( ๐‘Ž ) = ๐‘Ž . [ Select ] True False 3) If a function f is continuous on [a,b], then there is a c in [a,b] with ๐‘“ ( ๐‘ ) = ๐‘“ ( ๐‘Ž ) + ๐‘“ ( ๐‘ ) 2 . [ Select ] True False 4) The function ๐‘“ ( ๐‘ฅ ) = 1 + ๐‘ฅ 2 ๐‘ฅ 2 โˆ’ 4 has a maximum on [-3,3]. [ Select ] True False

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We are given four statements and must evaluate each as True or False, explaining why each option is correct or incorrect. Option 1: There is no solution of e^x + e^(โˆ’x^2) = 2 on [โˆ’2, 2]. This statement claims there are no x in [โˆ’2,2] solving the equation e^x + e^(โˆ’x^2) = 2. To assess this, consider the typical behavior of such exponentials: at x = 0, e^0 + e^0 = 1 + 1 = 2, so x = 0 is a solution. Therefore, the claim that there is no solution is false. In addition, even if the ex......Login to view full explanation

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Find numbers a and b, or k, so that f is continuous at every point.

The function [math: f(x)={โˆ’2x+4if x<0,โˆ’4xโˆ’6if x>0]f(x)=\left \{\begin {array}{ll}-2x+4&\text {if }x<0,\\-4x-6&\text {if }x>0\end {array}\right . is continuous.

Suppose we know the following information about the functionย  ๐‘“ ( ๐‘ฅ ) :ย  ๐‘“ ( โˆ’ 1 ) = โˆ’ 4 , ๐‘“ ( 2.5 ) = 3 , ๐‘“ ( ๐œ‹ ) = 2.4 and ๐‘“ ( 1 ) does not exist lim ๐‘ฅ โŸถ โˆ’ 1 โˆ’ ๐‘“ ( ๐‘ฅ ) = โˆ’ 4 lim ๐‘ฅ โŸถ โˆ’ 1 + ๐‘“ ( ๐‘ฅ ) = โˆ’ 4 lim ๐‘ฅ โŸถ 2.5 + ๐‘“ ( ๐‘ฅ ) = โˆ’ โˆž lim ๐‘ฅ โŸถ ๐œ‹ ๐‘“ ( ๐‘ฅ ) = 0 lim ๐‘ฅ โŸถ 8 โˆ’ ๐‘“ ( ๐‘ฅ ) = 3 lim ๐‘ฅ โŸถ 8 + ๐‘“ ( ๐‘ฅ ) = 3.01 ย  What does this information tell us about the continuity of ๐‘“ ( ๐‘ฅ ) ? At ๐‘ฅ = โˆ’ 1 , ๐‘“ ( ๐‘ฅ ) is/has a [ Select ] jump discontinuity infinite discontinuity continuous discontinuous, but there is not enough information to tell which type there is not enough information to tell anything removable discontinuity . At ๐‘ฅ = 1 , ๐‘“ ( ๐‘ฅ ) ย is/has a [ Select ] infinite discontinuity continuous there is not enough information to tell anything jump discontinuity removable discontinuity discontinuous, but there is not enough information to tell which type . At ๐‘ฅ = 2.5 , ๐‘“ ( ๐‘ฅ ) ย is/has a [ Select ] continuous discontinuous, but there is not enough information to tell which type removable discontinuity jump discontinuity there is not enough information to tell anything infinite discontinuity . At ๐‘ฅ = ๐œ‹ , ๐‘“ ( ๐‘ฅ ) ย is/has a [ Select ] there is not enough information to tell anything discontinuous, but there is not enough information to tell which type jump discontinuity continuous infinite discontinuity removable discontinuity . At ๐‘ฅ = 8 , ๐‘“ ( ๐‘ฅ ) ย is/has a [ Select ] jump discontinuity there is not enough information to tell anything continuous removable discontinuity infinite discontinuity discontinuous, but there is not enough information to tell which type .

MTH1010_09_07_4

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