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" Let "a=min{x^(2)+2x+3,x in R}" and ", ...

`" Let "a=min{x^(2)+2x+3,x in R}" and ",` `b=Lt_(x rarr0)(64)/(x^(4))[1-cos(x/2)-cos(x/4)+cos(x/2)cos(x/4)]` then find the value of `a` and `b`

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