# Math Help - lagrange multipliers

1. Originally Posted by turion645344

i was just wondering where this came from, as i thought that the other values were (-0.75,-7/16) which gives a value of -1,27/128.
It's a "typo." I read x = -3/5 instead of x = -3/4. Sorry!

-Dan

2. Originally Posted by topsquark
It's a "typo." I read x = -3/5 instead of x = -3/4. Sorry!

-Dan
no worries!

i was also wondering whether to test the minimum using the idea that as
x goes of to infinity the objective becomes arbitrily large. can you actually use this concept to test for a minimum value?!

and is there a better way using a second derivative and plugging the numbers in, and if so how would it work?

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