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im alittle confused

why?

is that a general formula for intergrating exponentials?

no...

its the fundamental process for evaluating derivatives..

oh sorry yeah i ment diffrentiating

log base e of a right?

yeah

or natural log of a?

cool same page then

ln a

only if a=e

is there n easier proof because i havent learnt the general formula you used

it depends what you can use to prove
can use that the derivative of lny =y'/y

yeah ive seen that before

y=a^x
lny=lna^x
lny=xlna
y'/y=lna
y'=ylna
y'=a^x*lna

oh i see. i understand now thanks

but you haven't seen that form there is another form
f'(x0)=limx->x0[(f(x)-f(x0))/(x-x0)]

no i didnt understand the last line of his one

the third question is that a=e^(1/A)

do you differentiate it then sub in a=e^(1/A) to see if it is true?

ok thanks heaps :)