Question on: JAMB Mathematics - 2008
Evaluate (\int_1 ^2(6x^2-2x)dx)
A
16
B
13
C
12
D
11
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Correct Option: D
(\int_1 ^2(6x^2-2x)dx=[\frac{6x^3}{3}-\frac{2x^2}{2}]_1 ^2\
= [2x^3 - x^2]_1^2)
= [2(2)3 - (2)2] – [2(1)3 - (1)2]
= [16-4] – [2-1]
= 12 – 1
= 11
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