Luigi0210
  • Luigi0210
@celecity
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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Luigi0210
  • Luigi0210
This is a pretty simple derivative trick, to check if you have the right answer.
Luigi0210
  • Luigi0210
Let's say we have this equation: |dw:1378797236769:dw|
Luigi0210
  • Luigi0210
To get the derivative, all we do is "drop" the power, like so: |dw:1378797288603:dw| Then subtract one

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Luigi0210
  • Luigi0210
When dropping a power, you multiply it by whatever number is infront of that variable: the x^2 had a 1 in it, so 2*1=2 making it 2x The 3x had a power of 1, so drop that, 3*1=3. Since the x just had a power of 1, and we subtract 1, that makes it x^0, and anything(almost) to the 0 is one. So 3*1*1, making it just 3 Making sense so far?
anonymous
  • anonymous
Yes.
Luigi0210
  • Luigi0210
And the derivative of any constant, K, is always zero.
Luigi0210
  • Luigi0210
So the derivative of let's say, 3, is 0.
Luigi0210
  • Luigi0210
And let's solve that equation using the quotient rule: |dw:1378797614161:dw| |dw:1378797766826:dw| We get the same thing.
anonymous
  • anonymous
|dw:1378797961866:dw| This is what I'm having a road block understanding.
Luigi0210
  • Luigi0210
Sorry I meant difference quotient, not quotient rule. You'll get to Quotient rule in calc :3
Luigi0210
  • Luigi0210
All that comes from This: |dw:1378798135442:dw| The first part is this: \[f(x+h)\] meaning for your function, where ever there is a variable, plug in an (x+h)
Luigi0210
  • Luigi0210
and the x just happened to be squared, so the (x+h) replaces the x in that spot
Luigi0210
  • Luigi0210
|dw:1378798262515:dw|
anonymous
  • anonymous
Oh, okay. And the f just takes a coffee break?
Luigi0210
  • Luigi0210
Yea, it's just there to signify function
anonymous
  • anonymous
Got it :) Thank you
Luigi0210
  • Luigi0210
I hope so >.<
Luigi0210
  • Luigi0210
Good luck tomorrow!

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