Integralregning 13
Web-matematik
Integraler
∫ x dx = 12 ⋅ x2
∫ kx dx = k2 ⋅ x2
∫ k dx = k ⋅ x
∫ xn dx = 1n + 1 ⋅ xn + 1
∫ 1x dx = ln ( | x | )
Differentialregning (8)
∫ ax dx = axln ( a )
Integralregning (16)
∫ ex dx = ex
∫ ekx dx = 1k ⋅ ekx
∫ √ x dx = 23 ⋅ x1,5 = 23 ⋅ ( √ x )3
∫ ln ( x ) dx = x ⋅ ln ( x ) − x
Bevis:
( x ⋅ ln x − x )’ =
( x ⋅ ln x )’ − ( x )’ =
( x )’ ⋅ ln x + x ⋅ ( ln x )’ − 1 =
1 ⋅ ln x + x ⋅ 1x − 1 = ln x
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