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bmelyk
Group Title
Find the derivative of f(x) =2x^21/x^2 in three ways :
(a) using the quotient rule
(b) using the product rule
(c) using neither the product rule nor the quotient rule
I have already done all of these out.
my answers:
a) 2/x^3
b)4x^3+x+8/2
c)2
for each one I've gotten a different answer, just wondering why. I think I'm supposed to get the same answer each time.
 2 years ago
 2 years ago
bmelyk Group Title
Find the derivative of f(x) =2x^21/x^2 in three ways : (a) using the quotient rule (b) using the product rule (c) using neither the product rule nor the quotient rule I have already done all of these out. my answers: a) 2/x^3 b)4x^3+x+8/2 c)2 for each one I've gotten a different answer, just wondering why. I think I'm supposed to get the same answer each time.
 2 years ago
 2 years ago

This Question is Closed

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
is it:\[\frac{2x^21}{x^2}\]?
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Messed up in product rule somewhere.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Maybe doublecheck your exponents.
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
For product rule start with f(x) = (2x^21)(x^2) Then it's 'first times the derivative of the second, plus the second times the derivative of the first.'
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.0
i know the formula.
 2 years ago

Algebraic! Group TitleBest ResponseYou've already chosen the best response.1
nonquotientorproductrule way would be: 2x^2/x^2  1/x^2 =2 1/x^2 (2 1/x^2)' =  (2*x^3)
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.0
now i redid it and got 2/x
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.0
for the third way i did the definition of the derivative and i only got a 2
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
You're losing track of an exponent somewhere. What are you getting for the derivative of x^2 ?
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.0
i redid the product rule and got 2/x
 2 years ago

Algebraic! Group TitleBest ResponseYou've already chosen the best response.1
ur doing it wrong.
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.0
okay i got a and b right now, just wondering why my definition of the derivative one is wrong.
 2 years ago

bmelyk Group TitleBest ResponseYou've already chosen the best response.0
i got 2/x^3 for a and b but only 2 for the definition of the derivative.
 2 years ago
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