Math Problem Statement

Lim x->2 2x2squared + 3x -5

Solution

The given expression is:

limx2(2x2+3x5)\lim_{{x \to 2}} (2x^2 + 3x - 5)

To find this limit, we can simply substitute x=2x = 2 directly into the expression since it's a polynomial function and is continuous.

  1. Substitute x=2x = 2 into the expression: 2(22)+3(2)5=2(4)+652(2^2) + 3(2) - 5 = 2(4) + 6 - 5

  2. Simplify: 8+65=98 + 6 - 5 = 9

So, the limit is:

limx2(2x2+3x5)=9\lim_{{x \to 2}} (2x^2 + 3x - 5) = 9

Would you like a detailed explanation of the steps or more examples?

Here are 5 related questions for further practice:

  1. What is limx3(4x25x+2)\lim_{{x \to 3}} (4x^2 - 5x + 2)?
  2. Can you find limx1(x3+2x24x+3)\lim_{{x \to -1}} (x^3 + 2x^2 - 4x + 3)?
  3. What happens if you have limx2x24x2\lim_{{x \to 2}} \frac{x^2 - 4}{x - 2}?
  4. What is the behavior of limx0sin(x)x\lim_{{x \to 0}} \frac{\sin(x)}{x}?
  5. How do you handle limx11x1\lim_{{x \to 1}} \frac{1}{x - 1}?

Tip: For polynomials, limits at any point can be computed by direct substitution because they are continuous functions.

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Math Problem Analysis

Mathematical Concepts

Calculus
Limits
Polynomial Functions

Formulas

Direct substitution in limits for polynomials

Theorems

Continuity of polynomial functions

Suitable Grade Level

Grades 10-12