Derivative of \( \displaystyle \operatorname{asin}{\left(\sqrt{x} \right)} \)
Problem 2.481 · hard
Differentiate \( \displaystyle f(x) = \operatorname{asin}{\left(\sqrt{x} \right)} \).
- \[ \frac{d}{d x} \operatorname{asin}{\left(\sqrt{x} \right)} \]derivativeStart with the derivative of the function.✓ Proved
- \[ = \frac{\frac{d}{d x} \sqrt{x}}{\sqrt{1 - x}} \]chain algebraApply the chain rule to the arcsine function. Simplify the term inside the square root.✓ Proved
- \[ = \frac{1}{2 \sqrt{x} \sqrt{1 - x}} \]derivative algebraDifferentiate the inner square root function. Combine the terms into a single fraction.✓ Proved
- \[ = \frac{1}{2 \sqrt{x \left(1 - x\right)}} \]simplifySimplify the expression by bringing x into the square root.≈ Checked numerically
Answer \( \frac{1}{2 \sqrt{x} \sqrt{1 - x}} \)
✓ Nihil obstat Lines: 5 proved, 2 checked numerically. The answer was also checked a second way, without looking at the solution. Reviewers found nothing wrong with the explanation.
The full receipt
| Line | Status | Checked by | Detail |
|---|---|---|---|
| 1 | ✓ Proved | sympy 1.14.0 | line 1 is the problem as stated |
| 2 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 asin is real only on [-1, 1] undefined where 1 - x = 0 |
| 3 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where 1 - x = 0 |
| 4 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where 1 - x = 0 undefined where x = 0 |
| 5 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 undefined where 1 - x = 0 |
| 6 | ≈ Checked numerically | sympy 1.14.0 | sympy 1.14.0: simplify left -1/(2*sqrt(-x**2 + x)) + 1/(2*sqrt(x)*sqrt(1 - x)); numeric agreement only, at 24 of 24 sampled points undefined where x = 0 undefined where 1 - x = 0 undefined where x*(1 - x) = 0 |
| answer | ≈ Checked numerically | sympy 1.14.0 | sympy 1.14.0: final line against the stated answer: simplify left 1/(2*sqrt(-x**2 + x)) - 1/(2*sqrt(x)*sqrt(1 - x)); numeric agreement only, at 24 of 24 sampled points undefined where x = 0 undefined where 1 - x = 0 |
| answer, a second way | ✓ Proved | sympy 1.14.0 | SymPy differentiated f directly and got the stated answer |
Reviewers
gpt-oss:20b: passqwen3.6:27b-mlx: pass
Every verdict on record (6)
qwen3.6:27b-mlx: pass 2026-09-21gpt-oss:20b: pass 2026-09-21qwen3.6:27b-mlx: pass 2026-09-20gpt-oss:20b: pass 2026-09-20qwen3.6:27b-mlx: pass 2026-09-20gpt-oss:20b: pass 2026-09-20
Proved: SymPy reduced the difference between the two sides to zero. Checked independently: a separate
method, named above, confirmed it. Checked numerically: the two sides agree at every sampled point, which is evidence,
not proof. Reviewed: a model or a person read it; that is all a sentence can have. Solution by
gemma4:26b, checked 2026-09-26 with SymPy 1.14.0.