Evaluate \(\int^{3} _{2}(x^2 - 2x)dx\)
A
4
B
2
C
4/3
D
1/3
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
\(\int^{3} _{2}(x^2 - 2x)\)dx
=\(\left[\frac{x^3}{3}-\frac{2x^2}{2}\right ]^{3}_{2}\\\left[\frac{x^3}{3}-x^2 + C\right ]^{3}_{2}\\\left[\frac{3^3}{3}-3^2 + C \right ]-\left[\frac{2^3}{3}-2^2 + C \right ]\\9-9-\left[\frac{8}{3}-4 \right ]\)
=\(\frac{-8}{3}\) + 4 = \(\frac{4}{3}\)
Source: Myschool Past Questions Archive (Record #7837)