what is ln? in fns, never come across. (1 Viewer)

[s_t_a_r1234]

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[Jago]

ln is log natural. it is log_e

 

[Dreamerish*~]

ln = log_e.

 

[acmilan]

ln is the natural logarithm, also written as log_e since it is of base e. Other then that, its pretty much the same as any other log, at least as far as the HSC is concerned. Consult http://en.wikipedia.org/wiki/Natural_logarithm for more info.

Now what is fns?

 

[pLuvia]

fn = functions they could just write functions

 

[acmilan]

fn = functions they could just write functions

Oh right.

You've never come across ln in functions? If youre in yr 11 then that'd explain it.

 

[rnitya_25]

this is lne graph
http://www.math.umb.edu/~greeley/placement/testc/diagrams/34e.jpg

 

[jetfan]

yeah ln is log to the base e, when you derive it you get1/x, you cant integrate it, but if you have an integral of f'(x)/f(x), the answer is ln[f(x)] + c. But if you're in yr11, you'll get to this next year.

 

[rama_v]

yeah ln is log to the base e, when you derive it you get1/x, you cant integrate it, but if you have an integral of f'(x)/f(x), the answer is ln[f(x)] + c. But if you're in yr11, you'll get to this next year.

Actually, if u do 4 unit u can integrate it using integration by parts, the primitive function is just xlnx - x

y = xlnx - x
y' = (1)(lnx) + (x)(1/x) -1
= ln x

Also the graph 2 posts above is the graph of y = ln x , not y = ln e
y = ln e is equal to 1