x2 + ax + b কে x - 5 দ্বারা ভাগ করলে, 34 ভাগশেষ থাকে, এবং x2 + bx + a কে x - 5 দ্বারা ভাগ করলে 52 ভাগশেষ থাকে। তাহলে a + b = ?

This question was previously asked in
RRB ALP Previous Paper 13 (Held On: 20 Aug 2018 Shift 2)
View all RRB ALP Papers >
  1. 6
  2. -6
  3. 3
  4. -3

Answer (Detailed Solution Below)

Option 1 : 6
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x2 + ax + b কে x - 5 দ্বারা ভাগ করলে, 34 ভাগশেষ থাকে,

⇒ 52 + 5a + b = 34

⇒ 5a + b = 9      ----(1)

আবার,

x2 + bx + a কে x - 5 দ্বারা ভাগ করলে 52 ভাগশেষ থাকে,

⇒ 52 + 5b + a = 52

⇒ 5b + a = 27      ----(2)

(1) + (2) করে পাই,

⇒ 6a + 6b = 36

⇒ a + b = 6

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