Solve 2t^3/3-3t^2+2t+4

$$\frac { 2 t ^ { 3 } } { 3 - 3 t ^ { 2 } + 2 t + 4 }$$

Differentiate w.r.t. t

$$\frac{2t^{2}\left(3t^{2}-4t-21\right)}{-9t^{4}+12t^{3}+38t^{2}-28t-49}$$

Steps Using Derivative Rule for Quotient

Add 3 and 4 to get 7.

$$\frac{\mathrm{d}}{\mathrm{d}t}(\frac{2t^{3}}{7-3t^{2}+2t})$$

For any two differentiable functions, the derivative of the quotient of two functions is the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator, all divided by the denominator squared.

$$\frac{\left(-3t^{2}+2t^{1}+7\right)\frac{\mathrm{d}}{\mathrm{d}t}(2t^{3})-2t^{3}\frac{\mathrm{d}}{\mathrm{d}t}(-3t^{2}+2t^{1}+7)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax^{n} is nax^{n-1}.

$$\frac{\left(-3t^{2}+2t^{1}+7\right)\times 3\times 2t^{3-1}-2t^{3}\left(2\left(-3\right)t^{2-1}+2t^{1-1}\right)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

Simplify.

$$\frac{\left(-3t^{2}+2t^{1}+7\right)\times 6t^{2}-2t^{3}\left(-6t^{1}+2t^{0}\right)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

Multiply -3t^{2}+2t^{1}+7 times 6t^{2}.

$$\frac{-3t^{2}\times 6t^{2}+2t^{1}\times 6t^{2}+7\times 6t^{2}-2t^{3}\left(-6t^{1}+2t^{0}\right)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

Multiply 2t^{3} times -6t^{1}+2t^{0}.

$$\frac{-3t^{2}\times 6t^{2}+2t^{1}\times 6t^{2}+7\times 6t^{2}-\left(2t^{3}\left(-6\right)t^{1}+2t^{3}\times 2t^{0}\right)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

To multiply powers of the same base, add their exponents.

$$\frac{-3\times 6t^{2+2}+2\times 6t^{1+2}+7\times 6t^{2}-\left(2\left(-6\right)t^{3+1}+2\times 2t^{3}\right)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

Simplify.

$$\frac{-18t^{4}+12t^{3}+42t^{2}-\left(-12t^{4}+4t^{3}\right)}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

Combine like terms.

$$\frac{-6t^{4}+8t^{3}+42t^{2}}{\left(-3t^{2}+2t^{1}+7\right)^{2}}$$

For any term t, t^{1}=t.

$$\frac{-6t^{4}+8t^{3}+42t^{2}}{\left(-3t^{2}+2t+7\right)^{2}}$$

Evaluate

$$\frac{2t^{3}}{7+2t-3t^{2}}$$

Short Solution Steps

Add 3 and 4 to get 7.

$$\frac{2t^{3}}{7-3t^{2}+2t}$$