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y=-[log₂;(x^2+2)]²;-log(1/4)(x^2+2)+5=-[log₂;(x²;+2)]²;+1/2log₂;(x^2+2)+5設t=log₂;(x²;+2)∵x²;≥0,x²;+2≥2∴t=log₂;(x²;+2)≥log₂;2=1∴y=-t…
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