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[" 16."|f(0)^(x)(bt cos4t-a sin4t)/(t^(2...

[" 16."|f_(0)^(x)(bt cos4t-a sin4t)/(t^(2))dt=(a sin4x)/(x)" for all "x!=0" ,then "a" and "b" are given by "],[[" (a) "a=(1)/(4),b=1," (b) "a=2b=2],[" (c) "a=-1b=4," (d) "a=2b=4]]

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