Chelsea21 Posted May 1, 2011 Report Share Posted May 1, 2011 I'm struggling with the question 10 of the May 2010 math Sl exam. A word document with the question is attached within the post Appreciate the helpPaper 1 May 2010 - Question 10.docx Reply Link to post Share on other sites More sharing options...
Abu Posted May 1, 2011 Report Share Posted May 1, 2011 Here's everything up to part c. I can't actually do part d because I don't know how to explain it geometrically. The graph seems to have beens shifted to the right by π/2. For part c, you have to set the integral up, evaluate it equal to k with limits 0 and 2π. I've done that and integrated it, up to the point where you have to solve for k. I'm sure you can do it from there. If you have any problems with that, I can show you how to do that as well. Reply Link to post Share on other sites More sharing options...
iMuffinsx3 Posted May 1, 2011 Report Share Posted May 1, 2011 Hi, I'm having trouble with this vectors question.I know it has something to do with adding vectors but this diagram is confusing the heck out of me.I have no spatial sense lol. =[Help would be appreciated! Reply Link to post Share on other sites More sharing options...
iber2011 Posted May 1, 2011 Report Share Posted May 1, 2011 OG=OB+BGOB= i+jBG= kOG= i+j+kBut I'm not a mathematician...so check with other people as well 1 Reply Link to post Share on other sites More sharing options...
genepeer Posted May 1, 2011 Report Share Posted May 1, 2011 OG=OB+BGOB= 5i+5jBG= 5kOG= 5i+5j+5kBut I'm not a mathematician...so check with other people as welli, j, and k are unit vectors of length 1cm. The cubes side is 5cm. 1 Reply Link to post Share on other sites More sharing options...
Chelsea21 Posted May 2, 2011 Report Share Posted May 2, 2011 I'm struggling with the question 8 of the November 2010 math Sl exam. A word document with the question is attached within the post Appreciate the helpI Don't really know anything about vectors!Question 8 Math Sl November 2010 exam.docx Reply Link to post Share on other sites More sharing options...
genepeer Posted May 2, 2011 Report Share Posted May 2, 2011 1 Reply Link to post Share on other sites More sharing options...
Amy Li Posted May 3, 2011 Report Share Posted May 3, 2011 Hey I'm struggling with this math question:An airplane travels in a straight line at an average speed of 850 km/h at a constant height over level ground. It is due south of a point P on the ground from which its angle of elevation is 59 degrees. Ten seconds later, it is due west of P at an angle of elevation of 51 degrees. Calculate the height of the airplane. Reply Link to post Share on other sites More sharing options...
Chelsea21 Posted May 4, 2011 Report Share Posted May 4, 2011 I'm struggling with question 10 of the November 2009 math Sl exam.A word document with the question is attached within the postAppreciate the helpIt looks more like HL than SL !!!Question 10 Math Sl November 2009.docx Reply Link to post Share on other sites More sharing options...
pap6r Posted May 4, 2011 Report Share Posted May 4, 2011 @chelsea21: here you go~! considering you can't use a calculator in paper 1, I'd have to say the hardest part of solving this was doing the mental math for part d... 1 Reply Link to post Share on other sites More sharing options...
DarkAeon Posted May 4, 2011 Report Share Posted May 4, 2011 I'm struggling with question 10 of the November 2009 math Sl exam.A word document with the question is attached within the postAppreciate the helpIt looks more like HL than SL !!!is this a paper 1 or 2 question? Reply Link to post Share on other sites More sharing options...
pap6r Posted May 4, 2011 Report Share Posted May 4, 2011 I'm struggling with question 10 of the November 2009 math Sl exam.A word document with the question is attached within the postAppreciate the helpIt looks more like HL than SL !!!is this a paper 1 or 2 question?it was from paper 1. Reply Link to post Share on other sites More sharing options...
genepeer Posted May 5, 2011 Report Share Posted May 5, 2011 Hey I'm struggling with this math question:An airplane travels in a straight line at an average speed of 850 km/h at a constant height over level ground. It is due south of a point P on the ground from which its angle of elevation is 59 degrees. Ten seconds later, it is due west of P at an angle of elevation of 51 degrees. Calculate the height of the airplane.Distance = 850 km/hr * 10/3600 hr = 85/36 kmI hope I got it right this time, been making plenty mistakes & corrections 1 Reply Link to post Share on other sites More sharing options...
Markee Posted May 5, 2011 Report Share Posted May 5, 2011 hello guys! This one is on Exponents and Logarithms, so, I was wondering how would I go about doing this equation:Solve each of the equations for x:3x3=375Thanks in advance! Reply Link to post Share on other sites More sharing options...
Guest Deven Kothari Posted May 5, 2011 Report Share Posted May 5, 2011 (edited) How do I divide by 0?Dude,why are you in math HLdividing by zero doesnt give any value, it is called infinity or unreal. It is not even in the complex number field Edited May 5, 2011 by Aboo No text speak! Reply Link to post Share on other sites More sharing options...
Abu Posted May 5, 2011 Report Share Posted May 5, 2011 hello guys! This one is on Exponents and Logarithms, so, I was wondering how would I go about doing this equation:Solve each of the equations for x:3x3=375Thanks in advance! How can that be difficult? 1 Reply Link to post Share on other sites More sharing options...
Markee Posted May 5, 2011 Report Share Posted May 5, 2011 hello guys! This one is on Exponents and Logarithms, so, I was wondering how would I go about doing this equation:Solve each of the equations for x:3x3=375Thanks in advance! How can that be difficult? awww, thanks a bunch! I didn't say it was. O.oThe thing is, our teacher didn't go that far about the topic. She wasn't able to talk about THAT. Reply Link to post Share on other sites More sharing options...
Markee Posted May 6, 2011 Report Share Posted May 6, 2011 erm so, how am I suppose to solve the equation for x with this:x1/2=3???and if you could find me more examples, that would be great. Please and Thank You! Reply Link to post Share on other sites More sharing options...
pap6r Posted May 6, 2011 Report Share Posted May 6, 2011 erm so, how am I suppose to solve the equation for x with this:x1/2=3???and if you could find me more examples, that would be great. Please and Thank You!x = 32 = 9x1/2 is the same as the square root of x... Reply Link to post Share on other sites More sharing options...
dessskris Posted May 7, 2011 Author Report Share Posted May 7, 2011 The function f is defined by f(x)=xe2x.Its minimum point is at (-½, -1/2e). Its non-stationary inflexion point is at (-1, -1/e²).Determine the intervals on the domain of f where f is(i) concave up(ii) concave downThis question appeared in paper 1 (past semester exam at my school).How do I determine those? Should I look at the inflexion point or at the minimum point?Thank you. Reply Link to post Share on other sites More sharing options...
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