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Single Variable Calculus

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Moderate

Definite Integral: Addition and Limits Reversal

SVCALC-AUMGLN

Find $\int_{-1}^{-2} f(x) \ dx$ if $\int_{-1}^2 f(x) \ dx = 12$ and $\int_{-2}^2 f(x) \ dx = -3$.

A

$15$

B

$-9$

C

$9$

D

$-12$