91Ó°ÊÓ

Solve for the indicated letter. Each equation comes from the technical area indicated. \(3 B Y+5 Y=9 B S,\) for \(B \quad\) (physics: elasticity)

Reduce each fraction to simplest form. Each is from the indicated area of application. $$\frac{E^{2} R^{2}-E^{2} r^{2}}{\left(R^{2}+2 R r+r^{2}\right)^{2}} \quad \text { (electric power) }$$

In Exercises \(71-76,\) reduce each fraction to simplest form. Each is from the indicated area of application. $$\frac{E^{2} R^{2}-E^{2} r^{2}}{\left(R^{2}+2 R r+r^{2}\right)^{2}} \quad \text { (electric power) }$$

Solve the given problems. Is it true that \((1-2 x)^{2}=(2 x-1)^{2} ?\)

Reduce each fraction to simplest form. Each is from the indicated area of application. $$\frac{r_{0}^{3}-r_{i}^{3}}{r_{0}^{2}-r_{i}^{2}} \quad \text { (machine design) }$$

In Exercises \(71-76,\) reduce each fraction to simplest form. Each is from the indicated area of application. $$\frac{r_{0}^{3}-r_{i}^{3}}{r_{0}^{2}-r_{i}^{2}} \text { (machine design) }$$

Solve the given problems. Is it true that \((1-2 x)^{3}=(2 x-1)^{2}(1-2 x) ?\)

Solve for the indicated letter. Each equation comes from the technical area indicated. \(S q+S p=S p q+p,\) for \(q \quad\) (computer design)

Solve for the indicated letter. Each equation comes from the technical area indicated. \(E R=A t T_{0}-A t T_{1},\) for \(t \quad\) (energy conservation)

Solve the given problems. Is it true that \((1-2 x)^{4}=(2 x-1)^{3}(1-2 x) ?\)