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May 22, 2025, 02:24:01 am

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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #15 on: November 04, 2010, 02:02:24 pm »
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If you times the top by -1, it becomes 1

if you times the bottom by -1, you flip the inside of the bracket, and the 2 changes sign.

I dont see where the problem is lol its pretty straight forward
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stonecold

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Re: Derrick Ha mistake in methods book?
« Reply #16 on: November 04, 2010, 02:08:45 pm »
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If you times the top by -1, it becomes 1

if you times the bottom by -1, you flip the inside of the bracket, and the 2 changes sign.

I dont see where the problem is lol its pretty straight forward

I didn't know you could multiply out a bracket that had a power to it...or am I just stupid?

And do we need to know how to antidiff stuff where the denominator is non-linear or raised to a power?

You just got expand those yeah? 
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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #17 on: November 04, 2010, 02:10:56 pm »
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The bracket has a negative power so you can
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stonecold

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Re: Derrick Ha mistake in methods book?
« Reply #18 on: November 04, 2010, 03:33:46 pm »
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how does the bracket have a negative power?

sorry i'm so confused!
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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #19 on: November 04, 2010, 04:39:08 pm »
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Oops, i mean it has an odd power. (1-x)^3 is the same as -(x-1)^3
if you don't believe me, expand it out
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mikee65

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Re: Derrick Ha mistake in methods book?
« Reply #20 on: November 04, 2010, 04:42:04 pm »
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DERRICK HA MAKE NO MISTAKE
HAHAHAHAHHAHAHAHA

stonecold

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Re: Derrick Ha mistake in methods book?
« Reply #21 on: November 04, 2010, 04:44:49 pm »
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Oops, i mean it has an odd power. (1-x)^3 is the same as -(x-1)^3
if you don't believe me, expand it out

haha, nahh i believe you.  i just didn't get it.  thanks :)
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Re: Derrick Ha mistake in methods book?
« Reply #22 on: November 04, 2010, 05:18:28 pm »
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Page 18, at the bottom - his explanation about transformations. He says that you "firstly dilate from the y-axis by a factor of a". But below, he shows "y=ax^2" as the corresponding transformation. In that case, doesn't he mean "dilate from the x-axis"? :P
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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #23 on: November 04, 2010, 05:30:56 pm »
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I love dha's transformation method of replacing the shiz with y/k etc, pretty neat :D
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becca92

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Re: Derrick Ha mistake in methods book?
« Reply #24 on: November 04, 2010, 05:33:46 pm »
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Also I think the answer for question 4 Exam 1 on pg 131 is wrong because:
he did the derivative of f(g(2x2+3)) instead of f(g(2x2)+3)

can someone check?

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Re: Derrick Ha mistake in methods book?
« Reply #25 on: November 04, 2010, 05:34:31 pm »
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Any1 asked Dha that he studied alot, of just pulled 5 50's out from a hat? =P
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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #26 on: November 04, 2010, 05:34:55 pm »
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Also I think the answer for question 4 Exam 1 on pg 131 is wrong because:
he did the derivative of f(g(2x2+3)) instead of f(g(2x2)+3)

can someone check?

Yeah i came across that the other day, it's defs wrong
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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #27 on: November 04, 2010, 05:35:51 pm »
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Any1 asked Dha that he studied alot, of just pulled 5 50's out from a hat? =P

He did 60ish methods exams to prepare for his exams. (in year 10)
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JinXi

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Re: Derrick Ha mistake in methods book?
« Reply #28 on: November 04, 2010, 05:37:48 pm »
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Any1 asked Dha that he studied alot, of just pulled 5 50's out from a hat? =P

He did 60ish methods exams to prepare for his exams. (in year 10)

 :o Haven't even done 30 for all my subjects combined rofl  :P
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98.40_for_sure

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Re: Derrick Ha mistake in methods book?
« Reply #29 on: November 04, 2010, 05:52:05 pm »
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Any1 asked Dha that he studied alot, of just pulled 5 50's out from a hat? =P

He did 60ish methods exams to prepare for his exams. (in year 10)

 :o Haven't even done 30 for all my subjects combined rofl  :P

Haha ive only done like 3 for chem... unit 4 is boring as hell -_-
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