Understanding the Coefficient of a Term

Oct 13, 2025 by windailys.com 50 views

**In which expression is the coefficient of the $$n$$ term -1?**

Understanding the Coefficient of a Term

In algebra, the coefficient of a term is the numerical value that multiplies the variable. For example, in the expression $$3n^2 + 4n - 1$$, the coefficient of the $$n^2$$ term is 3, the coefficient of the $$n$$ term is 4, and the coefficient of the constant term is -1.

Analyzing the Options

To determine which expression has a coefficient of -1 for the $$n$$ term, we need to examine each option carefully.

Option A: $3n^2 + 4n - 1$

In this expression, the coefficient of the $$n^2$$ term is 3, the coefficient of the $$n$$ term is 4, and the coefficient of the constant term is -1. However, the coefficient of the $$n$$ term is 4, not -1.

Option B: $4n^2 + n - 5$

In this expression, the coefficient of the $$n^2$$ term is 4, the coefficient of the $$n$$ term is 1, and the coefficient of the constant term is -5. Again, the coefficient of the $$n$$ term is 1, not -1.

Option C: $-2n^2 - n + 5$

In this expression, the coefficient of the $$n^2$$ term is -2, the coefficient of the $$n$$ term is -1, and the coefficient of the constant term is 5. Here, the coefficient of the $$n$$ term is indeed -1.

Option D: $-n^2 + 5n + 4$

In this expression, the coefficient of the $$n^2$$ term is -1, the coefficient of the $$n$$ term is 5, and the coefficient of the constant term is 4. However, the coefficient of the $$n$$ term is 5, not -1.

Conclusion

Based on our analysis, the correct answer is Option C: $-2n^2 - n + 5$ , as it is the only expression where the coefficient of the $$n$$ term is -1.

Frequently Asked Questions

Q: What is the coefficient of a term in an algebraic expression?

A: The coefficient of a term is the numerical value that multiplies the variable.

Q: How do I determine the coefficient of a term in an expression?

A: To determine the coefficient of a term, look for the numerical value that multiplies the variable. For example, in the expression $$3n^2 + 4n - 1$$, the coefficient of the $$n^2$$ term is 3, the coefficient of the $$n$$ term is 4, and the coefficient of the constant term is -1.

Q: What is the difference between the coefficient and the exponent of a term?

A: The coefficient is the numerical value that multiplies the variable, while the exponent is the power to which the variable is raised. For example, in the expression $$3n^2$$, the coefficient is 3 and the exponent is 2.

Q: Can the coefficient of a term be a fraction or a decimal?

A: Yes, the coefficient of a term can be a fraction or a decimal. For example, in the expression $$\frac{1}{2}n^2 + 4n - 1$$, the coefficient of the $$n^2$$ term is $$\frac{1}{2}$$, the coefficient of the $$n$$ term is 4, and the coefficient of the constant term is -1.

Q: How do I identify the coefficient of the constant term in an expression?

A: The constant term is the term that does not have a variable. To identify the coefficient of the constant term, look for the numerical value that is not multiplied by a variable. For example, in the expression $$3n^2 + 4n - 1$$, the coefficient of the constant term is -1.