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Hopefully it is clear and helpful. First rule, always when there is gradient, usually you need to take a differentiation.

So, from the differentiation you will get the first equation, and then from the substitution itself you will get the second equation.

Then, use simultaneous equation. Ok?

So, from the differentiation you will get the first equation, and then from the substitution itself you will get the second equation.

Then, use simultaneous equation. Ok?

Date Posted:
2 years ago