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MatemáticasMatemáticas267 views·Updated Jun 22, 2026·2 pages

Guía Simple para Raíces, Racionalización y Logaritmos

L
laura Soler martinez@laurasolermartinez_ihxf

Las operaciones con números irracionales (raíces y logaritmos) son fundamentales...

1
of 2
RECUERDA
++:+
+:-=-
-:+=
-:-=-
X:3
Operaciones con NIR
Transformar a
tracción:
1,75$\rightarrow\frac{175}{100}$
• Raices:
Indice
$\sqrt[n]{a

Operaciones con Números Irracionales

¿Alguna vez te has preguntado cómo manejar esas raíces que parecen tan complicadas? En realidad, es más fácil de lo que piensas una vez que dominas los trucos básicos.

Las raíces se pueden transformar a potencias fraccionarias: √a = a^(1/2). Esto es súper útil porque puedes aplicar las reglas de los exponentes que ya conoces. Para multiplicar raíces con el mismo índice, simplemente multiplicas los radicandos: √3 × √4 = √12.

Cuando sumes raíces, primero tienes que simplificarlas sacando factores fuera. Por ejemplo, √12 = √(4×3) = 2√3. Solo puedes sumar raíces que tengan el mismo radicando: 2√3 + √3 = 3√3.

Truco importante: Si el índice es impar, la raíz siempre existe y mantiene el signo. Si es par, solo existe para números positivos.

2
of 2
RECUERDA
++:+
+:-=-
-:+=
-:-=-
X:3
Operaciones con NIR
Transformar a
tracción:
1,75$\rightarrow\frac{175}{100}$
• Raices:
Indice
$\sqrt[n]{a

Racionalización y Logaritmos

La racionalización es esa técnica que usas para eliminar raíces molestas del denominador de una fracción. Parece complicado, pero es solo multiplicar por la expresión conjugada.

Para racionalizar expresiones como 1/a+b√a + √b, multiplicas numerador y denominador por ab√a - √b. Esto aprovecha la identidad notable a+ba+baba-b = a² - b², que elimina las raíces del denominador.

Los logaritmos son el inverso de las potencias: log_a b = x significa que a^x = b. Las propiedades principales que necesitas recordar son: log(A×B) = logA + logB, logA/BA/B = logA - logB, y logAnA^n = n×logA.

Consejo para exámenes: Siempre verifica tus resultados sustituyendo valores. Si log₂8 = 3, comprueba que 2³ = 8.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Most popular content: Racionalización del denominador

2

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Most popular content

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Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5App Store
4.7/5Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan SiOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha KlichAndroid user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

AnnaiOS user
MatemáticasMatemáticas267 views·Updated Jun 22, 2026·2 pages

Guía Simple para Raíces, Racionalización y Logaritmos

L
laura Soler martinez@laurasolermartinez_ihxf

Las operaciones con números irracionales (raíces y logaritmos) son fundamentales en matemáticas de bachillerato. Estas herramientas te permitirán resolver ecuaciones complejas y simplificar expresiones que parecen imposibles al principio.

1
of 2
RECUERDA
++:+
+:-=-
-:+=
-:-=-
X:3
Operaciones con NIR
Transformar a
tracción:
1,75$\rightarrow\frac{175}{100}$
• Raices:
Indice
$\sqrt[n]{a

Sign up to see the content. It's free!

  • Access to all documents
  • Improve your grades
  • Join milions of students

Operaciones con Números Irracionales

¿Alguna vez te has preguntado cómo manejar esas raíces que parecen tan complicadas? En realidad, es más fácil de lo que piensas una vez que dominas los trucos básicos.

Las raíces se pueden transformar a potencias fraccionarias: √a = a^(1/2). Esto es súper útil porque puedes aplicar las reglas de los exponentes que ya conoces. Para multiplicar raíces con el mismo índice, simplemente multiplicas los radicandos: √3 × √4 = √12.

Cuando sumes raíces, primero tienes que simplificarlas sacando factores fuera. Por ejemplo, √12 = √(4×3) = 2√3. Solo puedes sumar raíces que tengan el mismo radicando: 2√3 + √3 = 3√3.

Truco importante: Si el índice es impar, la raíz siempre existe y mantiene el signo. Si es par, solo existe para números positivos.

2
of 2
RECUERDA
++:+
+:-=-
-:+=
-:-=-
X:3
Operaciones con NIR
Transformar a
tracción:
1,75$\rightarrow\frac{175}{100}$
• Raices:
Indice
$\sqrt[n]{a

Sign up to see the content. It's free!

  • Access to all documents
  • Improve your grades
  • Join milions of students

Racionalización y Logaritmos

La racionalización es esa técnica que usas para eliminar raíces molestas del denominador de una fracción. Parece complicado, pero es solo multiplicar por la expresión conjugada.

Para racionalizar expresiones como 1/a+b√a + √b, multiplicas numerador y denominador por ab√a - √b. Esto aprovecha la identidad notable a+ba+baba-b = a² - b², que elimina las raíces del denominador.

Los logaritmos son el inverso de las potencias: log_a b = x significa que a^x = b. Las propiedades principales que necesitas recordar son: log(A×B) = logA + logB, logA/BA/B = logA - logB, y logAnA^n = n×logA.

Consejo para exámenes: Siempre verifica tus resultados sustituyendo valores. Si log₂8 = 3, comprueba que 2³ = 8.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Most popular content: Racionalización del denominador

2

Most popular content in Matemáticas

9

Most popular content

9

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5App Store
4.7/5Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan SiOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha KlichAndroid user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

AnnaiOS user