Question

Need help!!

Answer 1

Question?????!!!!!

Answer 2

what can I do after that part?

Answer 3

@dayakar

Answer 4

b) last step remove lim symbol

just write answer 1/2

Answer 5

what is ur question

Answer 6

number c

Answer 7

http://assets.openstudy.com/updates/attachments/56bf080de4b059857045242e-mtalhahassan2-1455360446456-20160213_054041.jpg

Answer 8

how do u get the second line

Answer 9

i am using my slope of tangent formula

Answer 10

@dayakar

Answer 11

factoring out the 2, write your last expression as
\[ \lim_{h\rightarrow 0 }\frac{2}{h}\left( \frac{1}{\sqrt{9+h}} - \frac{1}{3}\right) \]
I would use a common denominator 3 sqr(9+h)
and get the expression
\[ \lim_{h\rightarrow 0 }\frac{2}{h}\left( \frac{3-\sqrt{9+h}}{3\sqrt{9+h}} \right) \]
now multiply top and bottom by \( (3+\sqrt{9+h})\)
the idea is up top we have (a-b)(a-b) = a^2 - b^2
and that gets rid of the square roots