http://sgforums.com/forums/2297/topics/320896 en-US 60 <p>thanks</p> <p>&nbsp;</p> Sat, 14 Jun 2008 01:12:14 +0800 sgforums.com:2297:320896:8164900 limywv http://sgforums.com/forums/2297/topics/320896 <blockquote> <div class="quote_from">Originally posted by limywv:</div> <div class="quote_body"> <p>thanks for the reply, but am I right by spltting the f graph into 4 parts, the most-left portion i see it as having a decreasing Positive&nbsp;gradient, so the f' graph for that part&nbsp;should be on the positive y&nbsp;plane</p> <p>&nbsp;</p> <p>Ok so how about the next qn, i seriously not sure of it..</p> </div> </blockquote> <p>the left-most part is actually increasing positive gradient. Do look again. Decreasing means you should see it tending to a turning point again.</p> <p>&nbsp;</p> <p>the next question, do it the same way as you have done lor.... when x is -ve infinity or infinity, f'(x) = 0</p> <p>then as x tends to zero, your f'(x) will curve up, then curve down again to zero where f(x) is at the turning point, then curve up again, then down back to zero again... You f'(x) graph will look something like a camel double hump</p> Sat, 14 Jun 2008 00:53:05 +0800 sgforums.com:2297:320896:8164863 eagle http://sgforums.com/forums/2297/topics/320896 <p>thanks for the reply, but am I right by spltting the f graph into 4 parts, the most-left portion i see it as having a decreasing Positive&nbsp;gradient, so the f' graph for that part&nbsp;should be on the positive y&nbsp;plane</p> <p>&nbsp;</p> <p>Ok so how about the next qn, i seriously not sure of it..</p> Sat, 14 Jun 2008 00:50:10 +0800 sgforums.com:2297:320896:8164851 limywv http://sgforums.com/forums/2297/topics/320896 <p>looks almost correct</p> <p>but as x tends to infinity or - infinity, i seems that the gradient increases faster and faster... So your red curve shouldn't really be concave downwards at both ends I think...</p> Sat, 14 Jun 2008 00:44:45 +0800 sgforums.com:2297:320896:8164843 eagle http://sgforums.com/forums/2297/topics/320896 <p>hey guys, got a question to ask...it's H2 maths, regarding f(x) to f'(x) graphs..I've included a scan so pls correct me if i'm wrong.</p> <p>&nbsp;thanks.</p> <p><img src="http://img81.imageshack.us/img81/4536/picturepk8.jpg" height="636" alt="sd" width="640" /></p> Sat, 14 Jun 2008 00:35:58 +0800 sgforums.com:2297:320896:8164814 limywv http://sgforums.com/forums/2297/topics/320896