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Using only definition 4.3.1 (continuity), prove that f(x)=x2+3x+4 is continuous on R.

Using only definition 4.3.1 (continuity), prove that f(x)=x2+3x+4 is continuous on R.

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Differentiate f(x) = (√ x +1)(x(2/5)+3x) f(x) =(5x3+1)/(x2+2x+1) f(x) = -5x(3x-3)4 f(x) = (2x + (x2+x)4)(1/3)
Differentiate f(x) = (√ x +1)(x(2/5)+3x) f(x) =(5x3+1)/(x2+2x+1) f(x) = -5x(3x-3)4 f(x) = (2x + (x2+x)4)(1/3)
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