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 P: 111 1. The problem statement, all variables and given/known data f(x,y) = $\sqrt{1+9xy}$, y = $x^{3}$ for 0≤x≤1 2. Relevant equations 3. The attempt at a solution I don't even know how to start this problem. I thought about c(t) since that's all I have been doing, but there isn't even c(t). I only recognize domain. Can anyone help me please?