Evaluate the following limit: `lim_(x->oo)(sqrt(x^2+a^2)-sqrt(x^2+b^2))/(sqrt(x^2+c^2)+sqrt(x^2+d^2))`

Explanation

To evaluate the limit

\[ \lim_{x \to \infty} \frac{\sqrt{x^2 + a^2} - \sqrt{x^2 + b^2}}{\sqrt{x^2 + c^2} + \sqrt{x^2 + d^2}}, \]

we will follow these steps:

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