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Let g(x)=[(3x^2-4sqrtx+1, x<1),(ax+b, x>...

Let `g(x)=[(3x^2-4sqrtx+1, x<1),(ax+b, x>=1))` If `g(x)` is continuous and differentiable for all numbers in its domain then (A) a=b=-4 (B) a=b=4 (C) a=4 and b =-4 (D) a=-4 and b=4

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