ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu...

Page 1 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=1' data-page='1' class='cut-thumb lazyload' alt='Page 1: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/1.jpg' width='140' height='200' /> Page 2 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=2' data-page='2' class='cut-thumb lazyload' alt='Page 2: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/2.jpg' width='140' height='200' /> Page 3 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=3' data-page='3' class='cut-thumb lazyload' alt='Page 3: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/3.jpg' width='140' height='200' /> Page 4 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=4' data-page='4' class='cut-thumb lazyload' alt='Page 4: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/4.jpg' width='140' height='200' /> Page 5 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=5' data-page='5' class='cut-thumb lazyload' alt='Page 5: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/5.jpg' width='140' height='200' /> Page 6 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=6' data-page='6' class='cut-thumb lazyload' alt='Page 6: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/6.jpg' width='140' height='200' /> Page 7 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=7' data-page='7' class='cut-thumb lazyload' alt='Page 7: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/7.jpg' width='140' height='200' /> Page 8 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=8' data-page='8' class='cut-thumb lazyload' alt='Page 8: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/8.jpg' width='140' height='200' /> Page 9 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=9' data-page='9' class='cut-thumb lazyload' alt='Page 9: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/9.jpg' width='140' height='200' /> Page 10 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=10' data-page='10' class='cut-thumb lazyload' alt='Page 10: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/10.jpg' width='140' height='200' /> Page 11 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=11' data-page='11' class='cut-thumb lazyload' alt='Page 11: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/11.jpg' width='140' height='200' /> Page 12 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=12' data-page='12' class='cut-thumb lazyload' alt='Page 12: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/12.jpg' width='140' height='200' /> Page 13 <img data-url='document/rang-vi-moi-k-ta-lun-c-0-4-ab2c2-2b2-2c2-1-3b-3c2-c2-2.html?page=13' data-page='13' class='cut-thumb lazyload' alt='Page 13: ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu thúc này không âm nên ta có' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader031.cupdf.com/reader031/viewer/2022022500/5aa1024b7f8b9a62178ef0b7/html5/thumbnails/13.jpg' width='140' height='200' />

ý rang vói moi k ta luôn có = 0. (4) [a(b2c2 + 2b2 + 2c2 + 1) _ 3b _ 3c]2 + (c2 + + 2) [(b _ + 2(bc — 1)2] b2c2 + 2b2 + 2c2 + Dé tháy biðu...

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