THO TO XUAN
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Tìm GTNN: A = 2/(6x - 5 - 9x^2) A = 2/ - [(9x^2 - 6x +5) +4] A = -2/ { ( 3x-1)^2 +4 } >= -2/4 = -1/2 Min A= -1/2 <=> x = 1/3 |
THO TO XUAN
|
Tìm GTNN: A = 2/(6x - 5 - 9x^2) A = 2/ - [(9x^2 - 6x +5) +4] A = -2/ { ( 3x-1)^2 +4 } >= -2/4 = -1/2 Min A= -1/2 <=> x = 1/3 |