AB=X则AD=12-X∴﹙12-X﹚^2+DP^2=﹙X-DP﹚^2∴DP=12-72/XS=1/2﹙12-X﹚﹙12-72/X﹚=108-﹙6X+432/X﹚∵6X+432/X≥2√﹙6X·432/X﹚=72√2∴S≤108-72√2仅当6X=432/X→X=6√2取等号所以:x=6√2时,△ADP的最大面积=1...
AB=X则AD=12-X∴﹙12-X﹚^2+DP^2=﹙X-DP﹚^2∴DP=12-72/XS=1/2﹙12-X﹚﹙12-72/X﹚=108-﹙6X+432/X﹚∵6X+432/X≥2√﹙6X·432/X﹚=72√2∴S≤108-72√2仅当6X=432/X→X=6√2取等号所以:x=6√2时,△ADP的最大面积=1...