Qualification > Math
urgent:trigonometric equation help and a few other questions
ashish:
--- Quote from: lhl_anecar on October 16, 2010, 06:26:18 pm ---Can someone please kindly help me solve these questions
4. find the deriavative of the following
a) y=x^5e^x + 3xlnx
b. R(e^t+1)(t-ln t)
--- End quote ---
4.a
let do it part by part
y=X5ex
dy/dx = X5ex-1 *5ex
second part using quotient rule
Udv/dx + Vdu/dx
= 3x*(1/x) + 3lnx
=3+3lnx
add these two
5exX5ex-1 + 3 + 3lnx
i just hope i didn't do any mistake with superscript
ashish:
for 4b i think you missed something ???
lhl_anecar:
thanks for the help!! appreciate it loads.. it's really kind of you guys to help me out.
i just have one last question that i am still unsure about and hope u guys can help me out
which is
using the product rule to find the derivatives of the following..
a) x^2[?x + (1/?x)]
thanks again!!
lhl_anecar:
--- Quote from: ashish on October 17, 2010, 06:08:40 am ---for 4b i think you missed something ???
--- End quote ---
R=(e^t+1)(t-lnt)
i missed out the = sign, sorry about that,i just don't seem to get how to differentiate ln. please help. thanks!!! :)
ashish:
oops sorry hey i have to go to school for exams ,, :-\ when i will do it when i will be back or maybe someone here will do it in the mean time ::)
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