# Help required with differentiation and integration

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• Jun 1st 2009, 04:13 AM
Tino1210
Help required with differentiation and integration
Hello, Ive got a maths exam next week and need help on differentiation as I'm finding it hard to get my head around. I have a few examples of theory questions, if someone could walk me through how to get the solution(s) that would be great, or just the solutions and I could work my way back through the method. Thanks

I have to differentiate the following:

f (x) = 2 exp (0.4x – 5)

g (x) = ln (2-3x)

I (t) = Pb/R (0.2 – 3e^at)

y (t) = 3 ln (0.5t – 0.4)

I also have to evaluate definite integrals but would need to scan that examples in, i think the above is more than enough to ask for help with. (Cool)
• Jun 1st 2009, 04:20 AM
HallsofIvy
Those look like fairly basic problems. How about showing what you have done and where you got stuck so we can see where you need help?
• Jun 2nd 2009, 04:37 AM
Tino1210
these are the solutions I got, are they correct, or on the right track at least?

f' (x) = 0.8 exp (0.4x – 5)

g' (x) = -3/(2-3x)

I' (t) = Pb/R (– 3ae^at)

y' (t) = 1.5/(0.5t – 0.4)