Mathematics

Mathematics

Problem

Which one of the following expressions represents a quantity that is strictly a number (does not depend on xx)? a) ∫0x2x dx\int_{0}^{x} 2x\,dx b) ∫2 dx\int 2\,dx c) ∫132x dx\int_{1}^{3} 2x\,dx d) ∫x3cos⁡t dt\int_{x}^{3} \cos t\,dt

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