Subjects/Calculus II/Useful forms/Formula8.6. Useful formsFormulaIn 8.6. Useful formsFormulaCopy LaTeX∫x−rdx=ln∣x−r∣+CVariablesCConstant real de integraciónxVariable independiente (variable de integración)dxDiferencial respecto de xrRadio o coordenada polarlnLogaritmo naturalRelated formulasRelatedFormulax2+px+qA1x+B1+(x2+px+q)2A2x+B2+⋯+(x2+px+q)mAmx+Bm.Open formulaOpen in sectionRelatedFormula∫(x−r)ndx=−(n−1)(x−r)n−11+C,n>1Open formulaOpen in sectionRelatedFormula∫x2+a2dx=a1arctan(ax)+C,a>0Open formulaOpen in section