Let f(x) be defined as follows: f(x)=[((...

Let `f(x)` be defined as follows: `f(x)=[((cosx-sinx)^(cose cx),-pi/2ltxlt0),(a,x=0),(((e^(1/x)+e^(2/x)+e^(3/x))/(ae^(2x)+be^(3x)),0ltxltpi/2)]` if `f(x)` is continuous `x=0` , then (a)`a=1/e`(b)`a=e`(c) `b=1/e` (d)`b=e`

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