Question:medium
If the coefficient of $y^{3}$ in the binomial expansion of $\left(2\alpha-\frac{y}{2}\right)^{8}$ is -7, then the value of $\alpha$ is equal to
If the coefficient of $y^{3}$ in the binomial expansion of $\left(2\alpha-\frac{y}{2}\right)^{8}$ is -7, then the value of $\alpha$ is equal to
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Logic Tip: Always clearly separate constants from variables when applying the general term formula. Pay special attention to negative signs inside the binomial, as they are raised to the power $r$ and frequently cause calculation errors.
Updated On: Apr 27, 2026
- $\frac{1}{2}$
- 2
- 3
- 6
- 8
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The Correct Option is A
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