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EasyDerivativesCalculus

Differentiate e3xe^{3x}.

The chain rule with a linear inner function.

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Final answer

f′(x)=3e3xf'(x) = 3{e}^{3x}

How we read your problem

Find the derivative of e^(3x) with respect to x.

ddx[e3x]\frac{d}{dx}\left[{e}^{3x}\right]

Step-by-step solution

  1. Exponential rule: d/dx[eᵘ] = eᵘ·u′

    ddx[e3x]=3e3x\frac{d}{dx}\left[{e}^{3x}\right] = 3{e}^{3x}
  2. Constant multiple rule

    ddx[3x]=3\frac{d}{dx}\left[3x\right] = 3
  3. Combine and simplify

    f′(x)=3e3xf'(x) = 3{e}^{3x}

The derivative is built from the outside in: sums split into terms, constants factor out, products and quotients use their rules, and every composite function multiplies by the derivative of its inside (chain rule).

Verification

  • Cross-checked numerically against an independent symbolic differentiator at 8 sample points ✓

About derivatives

Power, product, quotient and chain rules.

Power rule

Bring the exponent down and reduce it by one.

ddxxn=nxn−1\frac{d}{dx}x^n = nx^{n-1}
Chain rule

Differentiate the outer function, then multiply by the derivative of the inner.

ddxf(g(x))=f′(g(x)) g′(x)\frac{d}{dx}f(g(x)) = f'(g(x))\,g'(x)

Check your own work