PROBLEM SOLVING - tempat bertanya PR Kaskuser (SD, SMP, SMA) - Part 2
http://latex.codecogs.com/gif.latex?\begin{aligned}%2040t-5t^2&%3E35\\%20-5t^2+40t-35&%3E0\\%20(t-1)(t-7)&%3E0\\%201%3C&t%3C7%20\end{aligned} 1. f(1) = -3 = a+b+c f(2) = 1 = 4a+2b+c f(3) = 1 = 9a+3b+c tinggal di cari a, b dan c nya. 2. panjang = x -> lebar = (40...