Derivative of y=x^3-5/2x+1

1. Differentiate $\left(x^{3} - \frac{5 x}{2}\right) + 1$ term by term:

   1. Differentiate $x^{3} - \frac{5 x}{2}$ term by term:

      1. Apply the power rule: $x^{3}$ goes to $3 x^{2}$

      2. The derivative of a constant times a function is the constant times the derivative of the function.

         1. Apply the power rule: $x$ goes to $1$

         So, the result is: $- \frac{5}{2}$

      The result is: $3 x^{2} - \frac{5}{2}$

   2. The derivative of the constant $1$ is zero.

   The result is: $3 x^{2} - \frac{5}{2}$

The answer is:

$$3 x^{2} - \frac{5}{2}$$