Math Problem Statement

\lim_{x\rarr2} $$$$ \left(x^2-3x\right) $$$$ \left(x+1\right)

Solution

To solve the limit

limx2(x23x)(x+1),\lim_{x \to 2} \left(x^2 - 3x\right)(x + 1),

we can evaluate the expression by direct substitution. Let's break it down:

  1. First, substitute x=2x = 2 into both parts of the expression:

    • For x23xx^2 - 3x, when x=2x = 2:

    x23x=223(2)=46=2.x^2 - 3x = 2^2 - 3(2) = 4 - 6 = -2.

    • For x+1x + 1, when x=2x = 2:

    x+1=2+1=3.x + 1 = 2 + 1 = 3.

  2. Now, multiply the two results:

    (2)(3)=6.(-2)(3) = -6.

Thus, the limit is:

limx2(x23x)(x+1)=6.\lim_{x \to 2} \left(x^2 - 3x\right)(x + 1) = -6.

Would you like a more detailed explanation, or is there another concept you’d like to explore further?

Here are some related questions you might find useful:

  1. What is the limit of (x24)(x+1)(x^2 - 4)(x + 1) as x2x \to 2?
  2. How do we evaluate limits involving products of polynomials?
  3. Can we apply L'Hopital's rule to this problem?
  4. What happens if we substitute x=2x = 2 in a rational expression like x23xx+1\frac{x^2 - 3x}{x + 1}?
  5. How would the result change if we had a different value for xx instead of 2?

Tip: When evaluating limits of products, check if you can substitute directly. If both functions are continuous at the point, their product is also continuous, and you can just multiply their limits.

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Math Problem Analysis

Mathematical Concepts

Limits
Polynomials
Algebraic Expressions

Formulas

Limit of a product of functions
Direct substitution method

Theorems

Limit of a product of continuous functions

Suitable Grade Level

Grades 11-12