Easy
1 point
ID: #28062
Question
3⋅2ⁿ - 4⋅2ⁿ⁻² = কত?
Options
1
1
Correct Answer
2
2ⁿ⁺¹
Correct Answer
3
3
Correct Answer
4
2n
Correct Answer
Explanation
3⋅2ⁿ - 4⋅2ⁿ⁻² = 3⋅2ⁿ - 2²⋅(2ⁿ/2²) = 3⋅2ⁿ - 2ⁿ = 2ⁿ(3-1) = 2⋅2ⁿ = 2ⁿ⁺¹।
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Type
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