Definite integrals area under a curve and above the curve

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absolute value |n|

Definite integrals area under a curve and above the curve

1. Definite Integral under and above the curve $\int _{a}^{b}f(x)\,dx,\int _{b}^{c}|f(x)|\,dx=F(b)-F(a)+|F(b)-F(a)|,$