Original
Consider the curve defined by
{{MATH_161}}
Compute {{MATH_162}}.
{{CMD_163}}
First, notice that the problem asks for {{MATH_164}}, {{CMD_165}}not{{CMD_166}}
{{MATH_167}}. This
means the variables have changed places! Not to worry, everything is
exactly the same. We apply {{MATH_168}} to both sides of the equation to
get
{{MATH_169}}
which gives us
{{MATH_170}}
Distributing and multiplying by {{MATH_171}} yields
{{ENV_172}}
Grouping terms, factoring, and dividing finally gives us
{{ENV_173}}
so,
{{MATH_174}}
and now we see
{{MATH_175}}
{{CMD_176}}
{{CMD_177}}
{{CMD_178}}