ummm… i think i did it wrong… @_@

Hummm…

This morning, just few seconds before i woke up, i remember about my exam. The Numerical Method Exam, which should be my favourite subject ever.aaaiih,,, forget it forget it forget it forget it… [mantra spell :-D]

-.-

i think i did it wrong… πŸ˜€

so the problem is to calculate concentration of a pollutant in a river reach, and one thing i forgot is that “the gradient of concentration in the downstream is zero“. well, i’ve calculated it and i’ve drawn the graph, but… i think i did it wrong, tou…

is this correct..?

What do you think?

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