ln (x)=3,40 | e hoch
x= e^{3.4}
x ≈ 29.964
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3e^{x} -1=5 | +1
3e^{x} = 6 |:3
e^{x} = 2 | ln(..)
x= ln(2)
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ln(1-2x) = -5 ; z= 1-2x
ln(z)= -5 |e hoch
z= e^{-5}
Rücksubstitution:
1-2x =e^{-5} |-1
-2x =e^{-5} -1 |.(-1)
2x =-e^{-5} +1
x= (-e^{-5} +1)/2
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0.5e^x=10 |:0.5
e^x= 20
x=ln(20)