My Math Forum Find the tangent line approximation (#3)

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 March 19th, 2017, 07:49 PM #1 Member   Joined: Feb 2017 From: henderson Posts: 36 Thanks: 0 Find the tangent line approximation (#3) Find the tangent line approximation for f(x) = √(15 + x) near 0 Last edited by skipjack; March 20th, 2017 at 12:06 AM.
 March 19th, 2017, 08:26 PM #2 Senior Member     Joined: Sep 2015 From: USA Posts: 2,169 Thanks: 1141 you should be able to do this given you did most of the other one. $f(x) = \sqrt{15+x},~f(0)=\sqrt{15}$ $f'(x) = \dfrac{1}{2\sqrt{15+x}},~f'(0) = \dfrac{1}{2\sqrt{15}}$ $f(x) \approx \dfrac {1}{2\sqrt{15}}x +\sqrt{15}$
 March 19th, 2017, 09:25 PM #3 Senior Member   Joined: Aug 2012 Posts: 2,076 Thanks: 593 Should there be a daily limit on do-my-homework posts from new handles? Am I rude or inappropriate to ask? OP nothing personal, you'd not doing anything a lot of other people do, just more of it.
 March 20th, 2017, 12:35 AM #4 Global Moderator   Joined: Dec 2006 Posts: 19,866 Thanks: 1833 That would be arbitrary. Bobbyjoe has read what to do, but is making careless errors, and possibly needs a better understanding. That's a common situation.
March 20th, 2017, 01:33 AM   #5
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 Originally Posted by Maschke Should there be a daily limit on do-my-homework posts from new handles? Am I rude or inappropriate to ask? OP nothing personal, you'd not doing anything a lot of other people do, just more of it.
Even if there was, a bored helper would likely come along and do it anyway.

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