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Mathematics 14 Online
OpenStudy (anonymous):

Find the limit of the function algebraically. lim x^2-25/x-5 x>5

OpenStudy (anonymous):

is the answer 5?

OpenStudy (anonymous):

(x-5)(x+5)/(x-5)

OpenStudy (anonymous):

(x+5)

OpenStudy (anonymous):

hey could you help me wih another one?

OpenStudy (anonymous):

Find the limit of the function by using direct substitution. lim (3x* cosx) x>pi/2

OpenStudy (anonymous):

1 pi/2 0 5e^pi/2

OpenStudy (anonymous):

these are my choices.. and im not quite getting the occillation thing

OpenStudy (anonymous):

3e (then x as an expontent) cosx

OpenStudy (anonymous):

i have to go sorry but back ill be back in like 45 mins

OpenStudy (anonymous):

@tcarroll010

hartnn (hartnn):

ok, so directly put x= pi/2 in (3x* cosx) what u get ?

OpenStudy (anonymous):

4.70

hartnn (hartnn):

what is cos (pi/2) =... ?

OpenStudy (anonymous):

.917

hartnn (hartnn):

you must be using your calculator in degree mode. then pi/2 = 90 degrees what is cos 90 =... ?

OpenStudy (anonymous):

0

hartnn (hartnn):

yes, so the entire thing is 0 :)

OpenStudy (anonymous):

ooooo okay thank you

hartnn (hartnn):

welcome ^_^

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