1 . সংশ্লেষাংক r এর মান -

• A. − ∞ ≤ r ≤ ∞
• B. − ∞ ≤ r ≤ 0
• C. 0 ≤ r ≤ 1
• D. − 1 ≤ r ≤ 1
• D. 0 ≤ r ≤ 2

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Answer: Option D

Explanation: