We are asked to find the limit of the function $\frac{2x^2 + 3x + 4}{x-1}$ as $x$ approaches 1 from the right. We want to evaluate $\lim_{x \to 1^+} \frac{2x^2 + 3x + 4}{x-1}$.

AnalysisLimitsCalculusFunctions
2025/7/8

1. Problem Description

We are asked to find the limit of the function 2x2+3x+4x1\frac{2x^2 + 3x + 4}{x-1} as xx approaches 1 from the right. We want to evaluate limx1+2x2+3x+4x1\lim_{x \to 1^+} \frac{2x^2 + 3x + 4}{x-1}.

2. Solution Steps

First, let's check the limit of the numerator and the denominator separately as xx approaches 1 from the right.
The numerator approaches 2(1)2+3(1)+4=2+3+4=92(1)^2 + 3(1) + 4 = 2 + 3 + 4 = 9.
The denominator approaches 11=01-1 = 0.
Since the denominator approaches 0 and the numerator approaches 9, we need to investigate further.
As xx approaches 1 from the right, x>1x > 1, so x1>0x-1 > 0. Therefore, x1x-1 approaches 0 from the positive side.
Thus, we have a constant number (9) divided by a number approaching 0 from the positive side.
This means the limit is positive infinity.
limx1+(2x2+3x+4)=2(1)2+3(1)+4=9\lim_{x \to 1^+} (2x^2 + 3x + 4) = 2(1)^2 + 3(1) + 4 = 9
limx1+(x1)=0+\lim_{x \to 1^+} (x-1) = 0^+
limx1+2x2+3x+4x1=90+=+\lim_{x \to 1^+} \frac{2x^2 + 3x + 4}{x-1} = \frac{9}{0^+} = +\infty

3. Final Answer

The limit is \infty.

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