kevin
0 Karma
Recent Names
- kevin
- paul
- :) 3====================D
- hayati lelah
- Dimitri
- Bareta
- d(ln x)/dx = 1/x
- cosh x = (e^x + e^-x)/2
- sinh x = (e^x - e^-x)/2
- d(a^x)/dx = a^x .ln a
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