{2ⁿ⁺⁴ - 2(2ⁿ)}/2(2ⁿ⁺³) এর মান কত?
Solution
Correct Answer: Option A
{2n + 4 - 2(2n)}/2(2n + 3)
= (2n + 4 - 2n + 1)/2n + 4
= (2n + 4/2n + 4) - (2n + 1/2n + 4)
= 1 - 2(n + 1) - (n + 4)
= 1 - 2- 3
= 1 - 1/8
= 7/8
= (2n + 4 - 2n + 1)/2n + 4
= (2n + 4/2n + 4) - (2n + 1/2n + 4)
= 1 - 2(n + 1) - (n + 4)
= 1 - 2- 3
= 1 - 1/8
= 7/8
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