20%5C%3A%20a%20%2B%20b%20%3D%202" id="TexFormula1" title="if \: \frac{ \sqrt{2} }{2} a + b = 0 \: and \: a + b = 2" alt="if \: \frac{ \sqrt{2} }{2} a + b = 0 \: and \: a + b = 2" align="absmiddle" class="latex-formula"> then a×b=?
Answer: It's not a function because the line is curved, and it has an exponent in the equation which makes the line curved instead of straight which will make x repeat.
