Let a and B Be Real Numbers $\int_{-\infty}^{a} \frac{10}{x^{2}+9} d x+\int_{a}^{\infty} \frac{10}{x^{2}+9} d x=?+\int_{b}^{\infty} \frac{10}{x^{2}+9} d x$

question 91

Multiple Choice

Let a and b be real numbers. What integral must appear in place of the question mark "?" to make the following statement true? $\int_{-\infty}^{a} \frac{10}{x^{2}+9} d x+\int_{a}^{\infty} \frac{10}{x^{2}+9} d x=?+\int_{b}^{\infty} \frac{10}{x^{2}+9} d x$

• A) \(\int_{-\infty}^{a} \frac{9}{x^{2}+10} d x\)
• B) \(\int_{0}^{-\infty} \frac{10}{x^{2}-9} d x\)
• C) \(\int_{-\infty}^{b} \frac{10}{x^{2}+9} d x\)
• D) \(\int_{0}^{-\infty} \frac{10}{x^{2}+9} d x\)
• E) \(\text { none of these }\)

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