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    • Thread Starter
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    Hi guys, umm...could some1 please give me a hand on this question-i just dont know where to start o

    Q) If y = x^2 - x show that the derivative= 1 + ( 2y/x)

    Thanx!!
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    dy/dx = 2x-1

    1+(2y/x) = 1 + 2(x^2 - x)/x = 1 + (2x^2 - 2x)/x = 1 + 2x - 2 = 2x-1

    So we've shown dy/dx = 1 + (2y/x)


    ..I don't get the thread title btw.
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    y = x^2 - x
    dy/dx = 2x - 1

    but as y=x^2 - x = x(x-1)
    y/x = x-1
    2y/x = 2x - 2

    so you can write 2x - 1 as 2y/x + 1

    so dy/dx = 2y/x + 1
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    thanks! lol, i understand it now. =)

    Umm, the thread title...lets not go there lmao-i put it in there by accident, almost posted in the wrong qs & forgot 2 change the title anna. soz, lol
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    hey-i thought i changed ma name o.0 2 rammstein666, grrrrrr
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    Wtf is going on? Who's rammstein666?? And who are you??!
    • Thread Starter
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    Soz i dun know what happened there-i changed ma user name from Chrissi131 to Rammstein666. Bk 2 normal anywho
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    But..but..if you changed your username, then all your posts (past and present) should be under the same name (so those chrissi ones should change too).

    Or do you have 2 accounts? (and logging into each back and forth)
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    :confused: Sue her!
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    na, i jus got a new user account instead coz i have another e-mail address in use now
    • Thread Starter
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    Umm,...soz i upset u guys, but i didn't mean any harm by it.
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    Oh right. Cool.

    (no one's upset tho, just confused)
    • Thread Starter
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    Hey, how could i change my 1st account name?? tried the 'request new username', but i dun know if anything happened.

    Soz 4 the confusion =)
 
 
 
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Updated: April 13, 2006
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