Derivative of \( \displaystyle \sqrt{2} \sqrt{x} e^{2 x} \)
Problem 2.591 · hard
Differentiate \( \displaystyle f(x) = \sqrt{2} \sqrt{x} e^{2 x} \).
- \[ \frac{d}{d x} \sqrt{2} \sqrt{x} e^{2 x} \]derivativeStart with the derivative of the function.✓ Proved
- \[ = \sqrt{2} \frac{d}{d x} \sqrt{x} e^{2 x} \]constant-multiplePull out the constant factor.✓ Proved
- \[ = \sqrt{2} \left(\sqrt{x} \frac{d}{d x} e^{2 x} + e^{2 x} \frac{d}{d x} \sqrt{x}\right) \]productApply the product rule.✓ Proved
- \[ = \sqrt{2} \left(\sqrt{x} \frac{d}{d x} e^{2 x} + e^{2 x} \frac{d}{d x} x^{0.5}\right) \]rewriteRewrite sqrt(x) as x**0.5.✓ Proved
- \[ = \sqrt{2} \left(\frac{0.5 e^{2 x}}{x^{0.5}} + \sqrt{x} \frac{d}{d x} e^{2 x}\right) \]derivativeDifferentiate x**0.5.✓ Proved
- \[ = \sqrt{2} \left(\frac{0.5 e^{2 x}}{x^{0.5}} + 2 \sqrt{x} e^{2 x}\right) \]derivative✓ Proved
- \[ = \sqrt{2} \left(\frac{0.5}{x^{0.5}} + 2 \sqrt{x}\right) e^{2 x} \]algebraFactor out the common term exp(2*x).✓ Proved
- \[ = \sqrt{2} \left(2 \sqrt{x} + \frac{1}{2 \sqrt{x}}\right) e^{2 x} \]algebraRewrite x**(-0.5) as 1/sqrt(x).✓ Proved
- \[ = \frac{\sqrt{2} \left(4 x + 1\right) e^{2 x}}{2 \sqrt{x}} \]algebra simplifyCombine the terms inside the parentheses. Final simplified form.✓ Proved
Answer \( \frac{\sqrt{2} \left(4 x + 1\right) e^{2 x}}{2 \sqrt{x}} \)
✓ 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
| 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 |
| 3 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 |
| 4 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 |
| 5 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 |
| 6 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 |
| 7 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 |
| 8 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 |
| 9 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 |
| 10 | ✓ Proved | sympy 1.14.0 | simplify(a - b) reduced to 0 undefined where x = 0 |
| answer | ✓ Proved | sympy 1.14.0 | final line against the stated answer: simplify(a - b) reduced to 0 undefined where 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 (4)
qwen3.6:27b-mlx: pass 2026-09-21gpt-oss:20b: pass 2026-09-21qwen3.6:27b-mlx: pass 2026-09-21gpt-oss:20b: pass 2026-09-21
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.