If xy 0 which of the following must be positive? (BBA 09-10)

If xy 0 which of the following must be po… | Answer

Subject

Quantitative Aptitude

Topic

Number

If xy<0 and y>0 which of the following must be positive? (BBA 09-10)
Reading

ক)

x-y

খ)

2x+3y

গ)

(x+10)/(y+2)

ঘ)

(-y-2)/x

ঙ)

2y^2+x

Explanation

-x-y: negative - positive = negative (positive নয়) -2x+3y: 2(negative) + 3(positive), এর মান positive বা negative হতে পারে (নিশ্চিত নয়) -(x+10)/(y+2): (negative+10)/(positive+2), এর মান positive বা negative হতে পারে (নিশ্চিত নয়) -(-y-2)/x: (negative-2)/negative = positive (সঠিক) -2y^2+x: 2(positive^2) + negative, এর মান positive বা negative হতে পারে (নিশ্চিত নয়) *সুতরাং, সঠিক উত্তর হল (D) (-y-2)/x।

If x is a non-zero integer which of the following must be a negative integer?I. -(3x^2+4) II. -(-x) III. (-x)^3

If xy<0 and y>0 which of the following must be positive? (BBA 09-10)Reading

If xy<0 and y>0 which of the following must be positive? (BBA 09-10)

Explanation

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If xy<0 and y>0 which of the following must be positive? (BBA 09-10)
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