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Calle87Best ResponseYou've already chosen the best response.0
\[\frac{ 1 }{ \sqrt{x} }\]
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
it's lim as h>0 (f(x+h)f(x))/h
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
f(x+h) = 1/sqrt(x+h) f(x) = 1/sqrt(x)
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
Do some algebra, cancel out the hs
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
\[\frac{ \frac{ 1 }{ \sqrt{x+h} }\frac{ 1 }{ \sqrt{x} } }{ h }\]
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
yea, now multiply by the conjugate i think.. both top and bottom
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
\[\frac{ \frac{ \sqrt{x}+\sqrt{xh}}{ \sqrt{x}\sqrt{x+h} } }{ h }\]
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
oops meant to put the h on the bottom :}
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
it's supposed to be a minus
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
all the way on top in the middle
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
and the other one on top must be a plus
 one year ago

acrossBest ResponseYou've already chosen the best response.1
Inside the radical, too.
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
u mixed up the signs
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
ok so i got all that part, the conjugates are what get me
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
twiddla time then.. hang on a sec
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
\[\frac{ h }{ h \sqrt{x}\sqrt{x+h(\sqrt{x}+\sqrt{x+h})} }\]
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
that square root is mess up in the bottom
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
No, since h is 0, on the bottom u just have sqrt(x+0)
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
so it's 1/sqrt(x) which is correct
 one year ago

Calle87Best ResponseYou've already chosen the best response.0
at what point do i make h = 0?
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
when u dont run into trouble if u do.
 one year ago

bahrom7893Best ResponseYou've already chosen the best response.2
1/h < NO 1/(4+1) < YES
 one year ago
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