Algebraic Expressions MCQs
Showing 3 questions (Total: 3)
Bangladesh Bank #1
If X = 12 , Which of the following has the maximum value ?
A: ( x - 3 )
B: ( x - 7 ) ( x - 9 )
C: ( x - 5 ) ( x - 3 )
D: ( x - 8 ) ( x - 7 )
Correct Answer:
C: ( x - 5 ) ( x - 3 )
Explanation:
If X = 12 , Which of the following has the maximum value ? Correct Answer ( x - 5 ) ( x - 3 ) x - 3= 12 - 3= 9(x - 7)(x - 9)=(12 - 7)(12 - 9)=5 × 3=15(x - 5)(x - 3)=(12 - 5)(12 - 3)=7 × 9=63 (answer:)(x - 8)(x - 7)=(12 - 8)(12 - 7)=4 × 5=20x - 2=12 - 2=10
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43rd BCS Preliminary Test #2
x=4+3 হলে, x3+1x3 এর মান কত?
ক: 53
খ: 52
গ: 5√2
ঘ: 2√5
Correct Answer:
খ: 52
Explanation:
x=4+3 হলে, x3+1x3 এর মান কত? সঠিক উত্তর 52 x = √4+√31/x = (√4-√3)/(4-3)= √4-√3x+1/x = 2√4 = 4Now,x3+1/x3 = (x+1/x)3 – 3 . x . 1/x (x + 1/x)= 43 – 3×4= 64 - 12= 52
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44th BCS Preliminary Test #3
যদি x34=2 হয়, তাহলে x32 =?
ক: 8
খ: 16
গ: 4
ঘ: 64
Correct Answer:
গ: 4
Explanation:
যদি x34=2 হয়, তাহলে x32 =? সঠিক উত্তর 4 x34=2⇒x3=24⇒x3=16⇒x =163 = 23-23x =232x3=23.2x32=16 =4
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