February 22nd, 2015, 02:02 PM  #1 
Member Joined: Jan 2015 From: Norway Posts: 95 Thanks: 1  Lengths and angles
a>= 3 b>= square root 2 <_ ( a>. b >) = 45 celsius f) decide t so that (A > + tb >) __ (2a >  b >) The book says the answer is t=  15/4 The book says p> __ q> <> P> * q> = 0 But in this case the answer dosent become 0. So i don't understand why __ in this case won't become cero Last edited by Zman15; February 22nd, 2015 at 02:05 PM. 
February 22nd, 2015, 02:54 PM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 407  Hello, Zman15! It's hard to read your notation. I'll guess what you mean. Quote:
 
February 22nd, 2015, 03:21 PM  #3 
Member Joined: Jan 2015 From: Norway Posts: 95 Thanks: 1 
Thanks for the answer i need a help with an other task : http://i1277.photobucket.com/albums/...psogbql2s2.jpg The figure shows a> = 2 and b> = 3 I have a problem with task C) whict says BC> = a + b and decide  BC>  The book says the answer is square root 19, and square root 19 = 4.35. A + B = 2 + 3 = 5. And  BC  = BC ^ 2 = 5 ^ 2 = 25. Which would mean square root of 25 is 5. Has the book given the wrong answer again? 

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