a,b,c are real numbers.X equal minimum in[a,b,c,1-a-b-c].Task is to find maximum X.I think it is 1/4 ,but i can't prove.Can you help me , and also , how to solve problems like this?Thanks in advance!!
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Sum of 4 numbers in the array is 1, so there obviously should be a number that is equal or less than 0.25 (otherwise the sum would have been greater than 1).