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As an experienced tutor registered on UrbanPro.com, I understand the importance of addressing students' queries effectively. One such question that often arises is about the existence of a reciprocal for a particular rational number.

Identifying the Rational Number

The rational number in question is crucial to determine its reciprocal or lack thereof. In this case, the specific rational number is not provided, making it a generic inquiry.

Reciprocal of a Rational Number

1. Reciprocal Definition:

   • The reciprocal of a number is another number that, when multiplied by the original number, results in the multiplicative identity (1).

2. Existence of Reciprocal:

   • Most rational numbers have reciprocals.
   • Examples: Reciprocal of 2 is 1/2, and reciprocal of 5/3 is 3/5.

3. Exception: No Reciprocal for Zero:

   • The only exception is the number 0.
   • Zero has no reciprocal since any number multiplied by 0 does not yield 1.

Addressing the Question

Given the information provided, it is likely that the question refers to the rational number zero.

• The rational number with no reciprocal is 0.
  • Explanation: Any attempt to find the reciprocal of 0 leads to undefined results, as no number can be multiplied by 0 to produce 1.

Conclusion

In the context of rational numbers, it's essential for students to grasp the concept that, with the exception of zero, most rational numbers have reciprocals. This understanding contributes to their foundational knowledge in mathematics.

As a seasoned tutor registered on UrbanPro.com, I'm here to address a mathematical query regarding the reciprocal of a number.

Understanding the Question: The question posits, "The reciprocal of the reciprocal of a number is _________." Let's break down the concept and arrive at a clear answer.

Reciprocal Basics:

1. The reciprocal of a number is found by taking the multiplicative inverse of the number. For a given number 'a,' its reciprocal is 1/a.
2. The reciprocal of the reciprocal of a number involves taking the reciprocal twice, which essentially brings us back to the original number.

Answering the Question: The reciprocal of the reciprocal of a number is the number itself.

Explanation:

1. Let 'a' be a non-zero number.
2. The reciprocal of 'a' is 1/a.
3. The reciprocal of 1/a is again 'a.'

Therefore, the reciprocal of the reciprocal of any non-zero number 'a' is 'a' itself.

Conclusion: In the realm of reciprocals, understanding that the double reciprocal brings us back to the original number is fundamental. This concept is pivotal in various mathematical applications and problem-solving.

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Hello and thank you for reaching out to me, an experienced tutor registered on UrbanPro.com. I understand that you are seeking guidance on the rational number that is neither positive nor negative. Let me provide you with a clear and concise explanation.

The Rational Number in Question

The rational number that is neither positive nor negative is 0.

Explanation

• Zero as a Neutral Value: Zero is unique among rational numbers as it represents the neutral point on the number line.

• Not Positively or Negatively Charged: Unlike positive rational numbers, such as 1, 2, 3, etc., and negative rational numbers, such as -1, -2, -3, etc., zero does not carry a positive or negative charge.

• Position on the Number Line: When plotted on the number line, zero is positioned at the origin, indicating an absence of positive or negative magnitude.

Conclusion

In conclusion, the rational number 0 is neither positive nor negative. It holds a special place as the neutral element in the realm of rational numbers. If you have any further questions or if there's anything else I can assist you with, feel free to ask.

As a seasoned tutor registered on UrbanPro.com, I understand the importance of providing clear and concise explanations to students. Let's delve into the question at hand:

Rational Numbers and Additive Inverse

Rational Numbers Defined

Rational numbers are those that can be expressed as the quotient or fraction p/q, where p and q are integers and q is not equal to zero. Examples include 1/2, -3/4, and 7.

Additive Inverse Concept

The additive inverse of a number is the value that, when added to the original number, results in a sum of zero. For any rational number 'a,' its additive inverse is '-a.'

Identifying the Unique Rational Number

Exploring the Possibilities

To find a rational number that is equal to its additive inverse, we can set up an equation:

a+(−a)=0a+(−a)=0

Solution: Zero is the Key

The only rational number that satisfies this equation is zero (0).

• 0+0=00+0=0

Conclusion

In conclusion, among all rational numbers, zero is the unique number that is equal to its additive inverse. This understanding aligns with the fundamental properties of rational numbers and their additive inverses. If you have further questions or need additional clarification, feel free to reach out for more personalized assistance.

Excelling in Understanding the Product of Rational Numbers

1. Conceptual Clarity:

   • UrbanPro's tutors prioritize building a strong conceptual foundation.
   • Emphasis is placed on understanding the properties of rational numbers and their products.

2. Real-life Applications:

   • Tutors on UrbanPro incorporate real-life examples to illustrate the application of rational numbers.
   • This approach aids students in connecting theory to practical scenarios.

3. Problem-Solving Strategies:

   • The online coaching on UrbanPro focuses on equipping students with effective problem-solving strategies.
   • Tutors guide students through various scenarios involving the product of rational numbers, enhancing their analytical skills.

let's solve the given math problem: (−20)×(−1)+(−28)÷7(−20)×(−1)+(−28)÷7

• (−20)×(−1)=20(−20)×(−1)=20 (Multiplication of two negatives results in a positive)
• (−28)÷7=−4(−28)÷7=−4 (Division of two negatives results in a positive)
• 20+(−4)=1620+(−4)=16 (Addition of positive and negative numbers)

Therefore, the solution to (−20)×(−1)+(−28)÷7(−20)×(−1)+(−28)÷7 is 1616.