Consider {{MATH_51}} to be the variable, and express {{MATH_52}} as a function of {{MATH_53}}. {{CMD_54}} First, let's eliminate the variable {{MATH_55}}. We know that {{MATH_56}} is a constant and that {{MATH_57}} so {{MATH_58}}. Substitute this expression for {{MATH_59}} in the equation {{MATH_60}} {{CMD_61}} {{CMD_62}} {{MATH_63}} {{CMD_64}} {{CMD_65}}