∫Calc Practice

Derivative of \( \displaystyle \sqrt{1 - x^{2}} + \operatorname{asin}{\left(x \right)} \)

Problem 2.1890 · hard

Differentiate \( \displaystyle f(x) = \sqrt{1 - x^{2}} + \operatorname{asin}{\left(x \right)} \).
  1. \[ \frac{d}{d x} \left(\sqrt{1 - x^{2}} + \operatorname{asin}{\left(x \right)}\right) \]
    sumStart with the derivative of the sum.✓ Proved
  2. \[ = \frac{d}{d x} \sqrt{1 - x^{2}} + \frac{d}{d x} \operatorname{asin}{\left(x \right)} \]
    sum rewriteApply the sum rule. Rewrite the square root as a fractional power.✓ Proved
  3. \[ = \frac{d}{d x} \operatorname{asin}{\left(x \right)} + \frac{\frac{d}{d x} \left(1 - x^{2}\right)}{2 \sqrt{1 - x^{2}}} \]
    chainApply the chain rule to the first term.✓ Proved
  4. \[ = \frac{d}{d x} \operatorname{asin}{\left(x \right)} + \frac{\frac{d}{d x} \left(- x^{2}\right)}{2 \sqrt{1 - x^{2}}} \]
    constantSeparate the constant term.✓ Proved
  5. \[ = - \frac{x}{\sqrt{1 - x^{2}}} + \frac{d}{d x} \operatorname{asin}{\left(x \right)} \]
    power algebraDifferentiate the power term. Simplify the coefficients.✓ Proved
  6. \[ = - \frac{x}{\sqrt{1 - x^{2}}} + \frac{1}{\sqrt{1 - x^{2}}} \]
    derivative algebraDifferentiate the inverse sine term. Rewrite the negative exponent.✓ Proved
  7. \[ = \frac{1 - x}{\sqrt{1 - x^{2}}} \]
    simplifyCombine the fractions.✓ Proved
Answer \( \frac{1 - x}{\sqrt{1 - x^{2}}} \)

✓ Nihil obstat Every line of this solution was proved by the computer algebra system SymPy. The answer was also checked a second way, without looking at the solution. Reviewers found nothing wrong with the explanation.

The full receipt
LineStatusChecked byDetail
1✓ Provedsympy 1.14.0line 1 is the problem as stated
2✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
3✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
4✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
undefined where 1 - x**2 = 0
5✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
undefined where 1 - x**2 = 0
6✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
undefined where 1 - x**2 = 0
7✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
undefined where 1 - x**2 = 0
8✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
asin is real only on [-1, 1]
undefined where 1 - x**2 = 0
9✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
undefined where 1 - x**2 = 0
10✓ Provedsympy 1.14.0simplify(a - b) reduced to 0
undefined where 1 - x**2 = 0
answer✓ Provedsympy 1.14.0final line against the stated answer: simplify(a - b) reduced to 0
undefined where 1 - x**2 = 0
answer, a second way✓ Provedsympy 1.14.0SymPy differentiated f directly and got the stated answer

Reviewers

  • gpt-oss:20b: pass
  • qwen3.6:27b-mlx: pass
Every verdict on record (4)
  • qwen3.6:27b-mlx: pass 2026-10-09
  • gpt-oss:20b: pass 2026-10-09
  • qwen3.6:27b-mlx: pass 2026-10-09
  • gpt-oss:20b: pass 2026-10-09

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 2026-10-09 with SymPy 1.14.0.