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Let f(x)={-x^2,for x<0, x^2+8,for x ...

Let `f(x)={-x^2,for x<0,
x^2+8,for x geq 0 `
the x intercept of the line, that is, the tangent to the graph of f(x) , is zero (b) -1 (c) -2 (d) -4

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