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GROUPS:
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WolframAlpha
Calculus
Entering derivative formulas into WolframAlpha Pro
Flávio Luiz Gonçalves de Souza
Flávio Luiz Gonçalves de Souza, Estudante
Posted
10 years ago
This post was translated into English  please in future use only English language. ~ Moderation Team.
Hello Guys, I subscribed to wolfram alpha pro, and I would need help with the following question: How do I enter the derivative for the problems below into wolframalphapro? Determine the derivative of the following functions at the indicated points
a) f (x) = 3x + 2, at point 1.5
b) f (x) = 1  4x ², at point 0.1
c) f (x) = 2x ²  x  1, at point 2.5
Entering function is quiet [simple?], but for example if I type the function f (x) = 3x + 2, without the information of the point, I believe, the system returns unexpected results. Thanks to whoever can help me?
POSTED BY:
Flávio Luiz Gonçalves de Souza
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Moderation Team
Moderation Team, WOLFRAM
Posted
10 years ago
Marco  thank you very much for help with translation and the answer!
Flávio  in future please use only English language  this is a forum rule. Make use of automated translating services online if you do not know how to translate.
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Moderation Team
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Flávio Luiz Gonçalves de Souza
Flávio Luiz Gonçalves de Souza, Estudante
Posted
10 years ago
Hello Marco Thiel, Thanks for your answers helped and solved the problem.
Olá Marco Thiel, Obrigado pela sua respostas ajudou e resolveu o problema.
POSTED BY:
Flávio Luiz Gonçalves de Souza
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Marco Thiel
Marco Thiel, University of Aberdeen  Dept. of Physics/Mathematics
Posted
10 years ago
With the help of google translate I got this
"Hello Guys, I subscribed to wolfram alpha pro, and I would need help with the following question:
How do I enter the derivative for the problems below into wolframalphapro?
Determine the derivative of the following functions at the indicated points
a) f (x) = 3x + 2, at point 1.5
b) f (x) = 1  4x ², at point 0.1
c) f (x) = 2x ²  x  1, at point 2.5
Entering function is quiet [simple?], but for example if I type the function f (x) = 3x + 2, without the information of the point, I believe, the system returns unexpected results. Thanks to whoever can help me?"
I am not really sure whether you encounter problems without giving the point at which to evaluate the derivative or with the point. Here are the solutions for all examples:
http://www.wolframalpha.com/input/?i=+derivative+of+%283x%2B2%29+at+1.5
or
derivative of (3x+2) at 1.5
Here the same without the point:
http://www.wolframalpha.com/input/?i=+derivative+of+%283x%2B2%29+
d
erivative of (3x+2)
Here's the second example
http://www.wolframalpha.com/input/?i=+derivative+of+%281++4x%5E2%29+at+0.1+
and
http://www.wolframalpha.com/input/?i=+derivative+of+%281++4x%5E2%29+
For the last example we get:
http://www.wolframalpha.com/input/?i=+derivative+of+%282x+²++x++1%29+at+2.5+
or
http://www.wolframalpha.com/input/?i=+derivative+of+%282x+²++x++1%29
All of these give the expected results, and also allow you to display the stepwise solutions.
Cheers,
M.
POSTED BY:
Marco Thiel
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