x এর মান 2 থেকে হ্রাস পেয়ে - 2 হলে, নিচের কোনটি অবশ্যই বৃদ্ধি পাবে?
Solution
Correct Answer: Option A
x এর মান 2 হলে,
ক) 1/(x - 3) = 1/(2 - 3) = 1/-1 = - 1
খ) 1 + (1/x) = 1 + 1/2 = 3/2
গ) 5 - x2 = 5 - 22 = 1
ঘ) 2 + x = 2 + 2 = 4
x এর মান - 2 হলে,
ক) 1/(x - 3) = 1/( - 2 - 3) = 1/(- 5) = - 1/5
খ) 1 + (1/x) = 1 + 1/(- 2) = 1 - 1/2 = (2 - 1)/2 = 1/2
গ) 5 - x2 = 5 - (- 2)2 = 5 - 4 = 1
ঘ) 2 + x = 2 + ( - 2) = 2 - 2 = 0
ক) 1/(x - 3) = 1/(2 - 3) = 1/-1 = - 1
খ) 1 + (1/x) = 1 + 1/2 = 3/2
গ) 5 - x2 = 5 - 22 = 1
ঘ) 2 + x = 2 + 2 = 4
x এর মান - 2 হলে,
ক) 1/(x - 3) = 1/( - 2 - 3) = 1/(- 5) = - 1/5
খ) 1 + (1/x) = 1 + 1/(- 2) = 1 - 1/2 = (2 - 1)/2 = 1/2
গ) 5 - x2 = 5 - (- 2)2 = 5 - 4 = 1
ঘ) 2 + x = 2 + ( - 2) = 2 - 2 = 0
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