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Derivatives,
There is this problem that asks me to find the derivative of f(x)=2x^2 ONLY by making use of this formula: f'(x)=lim(h>0)(f(x+h)f(x))/h
My Question is this:
http://screencast.com/t/fdJEOQduGCj
 11 months ago
 11 months ago
Derivatives, There is this problem that asks me to find the derivative of f(x)=2x^2 ONLY by making use of this formula: f'(x)=lim(h>0)(f(x+h)f(x))/h My Question is this: http://screencast.com/t/fdJEOQduGCj
 11 months ago
 11 months ago

This Question is Closed

AravindGBest ResponseYou've already chosen the best response.1
Yep just use that formula
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
Check at my question
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
Can you write those?
 11 months ago

julian25Best ResponseYou've already chosen the best response.0
?????? it is right?????? the derivative is 4x
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
f(x)= 2x^2 f(x=h)= 2(x+h)^2
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
f(x+h)= 2x^2 f(x=h)= 2(x+h)^2
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
But my approach (the one with the red letters) gives 0. And I didn't do any mistake
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
thats what I said @AravindG
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
What is your problem ? You are getting correct answer 4x ?
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
No, look. The black letters is the solution manual. On the other hand the RED letters are my approach. The solution gives 4x. My solution gives 0. Both solutions doesn't have any mathematical mistake. ( and it's driving me crazy)
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
Why 0 ? You are told x=0 ?
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
that will be 0+4x .I dont see 0 anywhere
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
Do you see this http://screencast.com/t/YqaRwsAr5b
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
so option 1 will be correct
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
buth both options doesn't have any mathematical mistakes. Agree?
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
tell me which options you are speaking of
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
Which do you mean by saying both ?
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
Wait. Let me write the whole thing here on Open Study , 1 sec
 11 months ago

ChristosBest ResponseYou've already chosen the best response.0
Forget it I got my mistake, jeez and phew
 11 months ago

AravindGBest ResponseYou've already chosen the best response.1
lol Great you figured it out yourself :)
 11 months ago
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