[" If "f(x)={[e^(x),x<2],[a+bx,x>=2]" is...

[" If "f(x)={[e^(x),x<2],[a+bx,x>=2]" is differentiable for all "x in R," then "],[[" (A) "a+b,=0," (B) "a+2b=e^(2)," (C) "b=e^(2)]]quad " (D) none of these "

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