2002
Mathematics
JAMB
Find the maximum value of y in the equation y = 1 - 2x - 3x2
A.
5/4
B.
5/3
C.
3/4
D.
4/3
Correct Answer: 4/3
Explanation
Tn=a+(n−1)d (nth term of an AP). T9=5T5 a+8d=5(a+4d)⟹a+8d=5a+20d 5a−a+20d−8d=0⟹4a+12d=0 a+3d=0
Tn=a+(n−1)d (nth term of an AP). T9=5T5 a+8d=5(a+4d)⟹a+8d=5a+20d 5a−a+20d−8d=0⟹4a+12d=0 a+3d=0THIS WEEK's
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