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Nội dung: <blockquote data-quote="son93" data-source="post: 49838" data-attributes="member: 43593">**pp1: pp đạo hàmB1: tìm gtln,gtnn của <img src="https://www.codecogs.com/eq.latex?y=%7Bcos%7D%5E%7B2n%7Dx+%7Bsin%7D%5E%7B2n%7Dx" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> B2: cho a,b>0. cmr: \[\frac{a^n+b^n}{2}\geq (\frac{a+b}{2})^n\]với n>2 B3:  cmr nếu <img src="https://www.codecogs.com/eq.latex?0%5Cleq%20%5Calpha%20%5Cleq%5Cfrac%7B%5CPi%20%7D%7B2%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> thì   <img src="https://www.codecogs.com/eq.latex?%5Cfrac%7Btan%5Calpha%20+2sin%5Calpha%7D%7B3%7D%5Cgeq%20%5Calpha" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />  B4:cho a>0,b>0,x>y>0.  cm:<img src="https://www.codecogs.com/eq.latex?%7B%28%7Ba%7D%5E%7Bx%7D+%7Bb%7D%5E%7Bx%7D%29%7D%5E%7By%7D%3C%7B%28%7Ba%7D%5E%7By%7D+%7Bb%7D%5E%7By%7D%29%7D%5E%7Bx%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />  **sử dụng bất đẳng thức:B1: a,b,c là 3 canh tam giác cm:a)<img src="https://www.codecogs.com/eq.latex?%7C%5Cfrac%7Ba-b%7D%7Ba+b%7D+%5Cfrac%7Bb-c%7D%7Bb+c%7D+%5Cfrac%7Bc-a%7D%7Bc+a%7D%7C%3C1" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />      b)<img src="https://www.codecogs.com/eq.latex?%5Csqrt%7B2%7D%28a+b+c%29%5Cleq%5Csqrt%7B%7Ba%7D%5E%7B2%7D+%7Bb%7D%5E%7B2%7D%7D+%5Csqrt%7B%7Bb%7D%5E%7B2%7D+%7Bc%7D%5E%7B2%7D%7D+%5Csqrt%7B%7Bc%7D%5E%7B2%7D+%7Ba%7D%5E%7B2%7D%7D%3C%5Csqrt%7B3%7D%28a+b+c%29" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> B2:cho  a,b,c>0. cmr:  <img src="https://www.codecogs.com/eq.latex?%5Cfrac%7B1%7D%7B%7Ba%7D%5E%7B3%7D+%7Bb%7D%5E%7B3%7D+1%7D+%5Cfrac%7B1%7D%7B%7Bb%7D%5E%7B3%7D+%7Bc%7D%5E%7B3%7D+1%7D+%5Cfrac%7B1%7D%7B%7Bc%7D%5E%7B3%7D+%7Ba%7D%5E%7B3%7D+1%7D%5Cleq1" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> **sử dụng đk có nghiệm của pt: B1: tìm gtnn,gtln của: a) <img src="https://www.codecogs.com/eq.latex?y=%5Cfrac%7B2cosx-sinx+1%7D%7Bcosx+sinx+2%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />                                b)<img src="https://www.codecogs.com/eq.latex?y=%5Cfrac%7Bsin2x%7D%7Bcosx-sinx-2%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> B2:tìm gtln,nn của  <img src="https://www.codecogs.com/eq.latex?y=%5Cfrac%7Bx+2%7D%7B%7Bx%7D%5E%7B2%7D-x+1%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> **pp <img src="https://www.codecogs.com/eq.latex?%5CDelta" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> lặp:  B1:cm: <img src="https://www.codecogs.com/eq.latex?2%7Bx%7D%5E%7B2%7D+2%7By%7D%5E%7B2%7D+3%7Bz%7D%5E%7B2%7D+2zy-2xz+2x-2y+2z+3%3E0" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> B2:tìm gtnn <img src="https://www.codecogs.com/eq.latex?A=%7Bx%7D%5E%7B2%7D+2%7By%7D%5E%7B2%7D+3%7Bz%7D%5E%7B2%7D+2zy-xz+2x-2y" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> **pp lượng giác hóa: B1:x,y thỏa mãn x^2+y^2=1 tìm gtln,nn của: a)<img src="https://www.codecogs.com/eq.latex?A=3%7Bx%7D%5E%7B2%7D-2%7By%7D%5E%7B2%7D+4xy+1" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />                        b)<img src="https://www.codecogs.com/eq.latex?B=%5Cfrac%7B%7Bx%7D%5E%7B2%7D-2xy+1%7D%7B3%7Bx%7D%5E%7B2%7D+%7By%7D%5E%7B2%7D+4xy+2%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> B2:cho x,y thỏa mãn <img src="https://www.codecogs.com/eq.latex?4%7Bx%7D%5E%7B2%7D+%7By%7D%5E%7B2%7D-8x-2y+1=0" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> tìm gtln,nn của A=<img src="https://www.codecogs.com/eq.latex?%5Cfrac%7Bx-2y+1%7D%7Bx+y+1%7D" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /></blockquote>

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