
Difficult Question for Math JAMB 2006
Mathematics
Admin Admin
28012016 14:59:00 +0000These questions presented a challenge for most of the students that attempted them. Lets all attempt to answer them.
Question 5) If dy/dx = x + cos x, find y
A. x^{2}/_{2}  sin x + c
B. x^{2}  sin x + c
C. x^{2}/_{2} + sin x + c
D. x^{2} + sin x + c
Question 41) Convert 2232_{4} to a number in base six
A. 540_{6}
B. 254_{6}
C. 553_{6}
D. 450_{6}
UPDATE  ANSWER INCLUDED BELOW Question 5
The correct answer is C
SOLUTION
dy/dx = x + cosx
Cross Muiltiplying we have
dy = (x + cosx) dx
Integrating we have ∫dy = ∫(x + cosx) dx
y = ∫xdx + ∫cosxdx
y = x^{2}/2 + cosx + c.

Admin Admin
A big thanks to all who participate in solving the above questions including @Vivian Ada and @Joseph who got the answers right. The correct answer and solution for each question is updated in the post.
0 29012016 15:16:00 +0000

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