A) 4
B) 5
C) 6
D) 7
Correct Answer: A
Solution :
\[\int_{1}^{2}{[3x]\,dx=}\,\int_{1}^{1/3}{[3x]\,dx+}\,\int_{4/3}^{5/3}{[3x]\,dx}\] \[+\,\int_{5/3}^{2}{[3x]\,dx}\] \[=3\,\left( \frac{4}{3}-1 \right)+4\,\left( \frac{5}{3}-\frac{4}{3} \right)+5\,\left( 2-\frac{5}{3} \right)=4\]You need to login to perform this action.
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