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1+2+3+4+5+6+7+8+9-1-2-3-4-5-6-7-8-9*1*2*3*4*5*6*7*8*9:1:2:3:4:5:6:7:8:9=???
Tính:1) dfrac{1}{3-2sqrt{2}}+dfrac{1}{2+sqrt{5}}2) dfrac{1}{3-2sqrt{2}}-dfrac{1}{3+2sqrt{2}}3) dfrac{1}{sqrt{5}-sqrt{7}}+dfrac{2}{1-sqrt{7}}4) dfrac{1}{5+2sqrt{6}}-dfrac{1}{5-2sqrt{6}}5) -dfrac{1}{sqrt{2}-sqrt{3}}-dfrac{3}{sqrt{18}+2sqrt{3}}
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Tính:
1) \(\dfrac{1}{3-2\sqrt{2}}+\dfrac{1}{2+\sqrt{5}}\)
2) \(\dfrac{1}{3-2\sqrt{2}}-\dfrac{1}{3+2\sqrt{2}}\)
3) \(\dfrac{1}{\sqrt{5}-\sqrt{7}}+\dfrac{2}{1-\sqrt{7}}\)
4) \(\dfrac{1}{5+2\sqrt{6}}-\dfrac{1}{5-2\sqrt{6}}\)
5) \(-\dfrac{1}{\sqrt{2}-\sqrt{3}}\)\(-\dfrac{3}{\sqrt{18}+2\sqrt{3}}\)
\(a:\sqrt{\left(\sqrt{3}-2\right)^2}+\sqrt{5+2\sqrt{6}}\)
b : \(\dfrac{\sqrt{6}-\sqrt{2}}{\sqrt{3}-1}-\sqrt{2}\)
c : \(\left(2+\dfrac{5-2\sqrt{5}}{2-\sqrt{5}}\right).\left(2+\dfrac{5-3\sqrt{5}}{3-\sqrt{5}}\right)\)
d : \(\left(\dfrac{15}{\sqrt{6}+1}+\dfrac{4}{\sqrt{6}-2}-\dfrac{12}{3-\sqrt{6}}\right).\left(\sqrt{6}+11\right)\)
Toán số 9, liên quan đến dạng căn. Các bạn giúp mình nhé, xin cảm ơn rất nhiều. :)1) (√3−2√√3−1+√3−1√2 )√√3−12) (√5+2√9√5−19−√7−√5):2√√5−23) √10+6√2−√10−6√2√5−√7 −√9+2√204) √5+√3+√5−√3√5+√22 −√6−√24√3+√3−√3−√3 5) √5+2√14√5−26−√4√5−1+√80−8√56) √11+√5+√11−√5√11+2√29 −√3−2√2
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Toán số 9, liên quan đến dạng căn. Các bạn giúp mình nhé, xin cảm ơn rất nhiều. :)
1) (√3−2√√3−1+√3−1√2 )√√3−1
2) (√5+2√9√5−19−√7−√5):2√√5−2
3) √10+6√2−√10−6√2√5−√7 −√9+2√20
4) √5+√3+√5−√3√5+√22 −√6−√24√3+√3−√3−√3
5) √5+2√14√5−26−√4√5−1+√80−8√5
6) √11+√5+√11−√5√11+2√29 −√3−2√2
\(\dfrac{\sqrt{6}-\sqrt{3}}{\sqrt{2}-1}+\dfrac{3+\sqrt{3}}{\sqrt{3}+1}+\dfrac{2}{\sqrt{2}+1}-\dfrac{4}{\sqrt{2}}\)
\(\dfrac{4}{\sqrt{5}+1}+\dfrac{5}{\sqrt{5}+2}+\dfrac{5}{\sqrt{5}+3}\)
Tính:1) dfrac{3}{1-sqrt{2}}+dfrac{sqrt{2}-1}{sqrt{2}+1}2) dfrac{sqrt{5}-1}{sqrt{5}+1}+dfrac{6}{1-sqrt{5}}3) dfrac{sqrt{2}+sqrt{3}}{2-sqrt{6}}+dfrac{sqrt{3}-sqrt{2}}{sqrt{6}+2}4) dfrac{3+sqrt{3}}{sqrt{3}}+dfrac{sqrt{6}-sqrt{3}}{1-sqrt{2}}5) dfrac{2-sqrt{2}}{1-sqrt{2}}+dfrac{sqrt{2}-sqrt{6}}{sqrt{3}-1}
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Tính:
1) \(\dfrac{3}{1-\sqrt{2}}+\dfrac{\sqrt{2}-1}{\sqrt{2}+1}\)
2) \(\dfrac{\sqrt{5}-1}{\sqrt{5}+1}+\dfrac{6}{1-\sqrt{5}}\)
3) \(\dfrac{\sqrt{2}+\sqrt{3}}{2-\sqrt{6}}+\dfrac{\sqrt{3}-\sqrt{2}}{\sqrt{6}+2}\)
4) \(\dfrac{3+\sqrt{3}}{\sqrt{3}}+\dfrac{\sqrt{6}-\sqrt{3}}{1-\sqrt{2}}\)
5) \(\dfrac{2-\sqrt{2}}{1-\sqrt{2}}+\dfrac{\sqrt{2}-\sqrt{6}}{\sqrt{3}-1}\)
\(\)1) \(\dfrac{5+2\sqrt{5}}{\sqrt{5}+\sqrt{2}}\)
2) \(\dfrac{2\sqrt{6}-\sqrt{10}}{4\sqrt{3}-2\sqrt{5}}\)
3) \(\dfrac{1}{2\sqrt{2}-3\sqrt{3}}\)
4) \(\sqrt{\dfrac{3-\sqrt{5}}{3+\sqrt{5}}}\)
Rút gọn: ( 2,5 Điểm )A dfrac{sqrt{6+2sqrt{5}}}{sqrt{5}+1}+ dfrac{sqrt{5-2sqrt{6}}}{sqrt{3}-sqrt{2}}B dfrac{3}{sqrt{5}-2}+ dfrac{4}{sqrt{6}+sqrt{2}}+ dfrac{1}{sqrt{6}+sqrt{5}}C dfrac{1}{sqrt{1}+sqrt{2}}+dfrac{1}{sqrt{2}+sqrt{3}}+dfrac{1}{sqrt{3}+sqrt{4}}+...+dfrac{1}{sqrt{99}+sqrt{100}}D dfrac{1}{2-sqrt{3}}+sqrt{7-4sqrt{3}}E sqrt{dfrac{3sqrt{3}-4}{2sqrt{3}+1}}-sqrt{dfrac{sqrt{3}+4}{5-2sqrt{3}}}F dfrac{1}{2+sqrt{3}}+dfrac{sqrt{2}}{sqrt{6}}-dfrac{2}{3+sqrt{3}}
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Rút gọn: ( 2,5 Điểm )
A= \(\dfrac{\sqrt{6+2\sqrt{5}}}{\sqrt{5}+1}\)+ \(\dfrac{\sqrt{5-2\sqrt{6}}}{\sqrt{3}-\sqrt{2}}\)
B= \(\dfrac{3}{\sqrt{5}-2}\)+ \(\dfrac{4}{\sqrt{6}+\sqrt{2}}\)+ \(\dfrac{1}{\sqrt{6}+\sqrt{5}}\)
C = \(\dfrac{1}{\sqrt{1}+\sqrt{2}}+\dfrac{1}{\sqrt{2}+\sqrt{3}}+\dfrac{1}{\sqrt{3}+\sqrt{4}}+...+\dfrac{1}{\sqrt{99}+\sqrt{100}}\)
D= \(\dfrac{1}{2-\sqrt{3}}+\sqrt{7-4\sqrt{3}}\)
E = \(\sqrt{\dfrac{3\sqrt{3}-4}{2\sqrt{3}+1}}-\sqrt{\dfrac{\sqrt{3}+4}{5-2\sqrt{3}}}\)
F = \(\dfrac{1}{2+\sqrt{3}}+\dfrac{\sqrt{2}}{\sqrt{6}}-\dfrac{2}{3+\sqrt{3}}\)
Thực hiện phép tính :1 ) frac{1}{5+2sqrt{6}}+frac{1}{5-2sqrt{6}}2 ) frac{5+sqrt{5}}{5-sqrt{5}}+frac{5-sqrt{5}}{5+sqrt{5}}3 ) frac{1}{2sqrt{5}+3sqrt{2}}-frac{1}{2sqrt{5}-3sqrt{2}}4 ) frac{1}{3sqrt{2}-4}-frac{1}{3sqrt{2}+4}5 ) frac{1}{sqrt{7-sqrt{24}}+1}-frac{1}{sqrt{7-sqrt{24}}-1}6 ) frac{sqrt{3}}{sqrt{sqrt{3}+1}-1}-frac{1}{sqrt{sqrt{3}+1}+1}7 ) sqrt{frac{3+sqrt{5}}{3-sqrt{5}}}+sqrt{frac{3-sqrt{5}}{3+sqrt{5}}}8 ) sqrt{frac{5+2sqrt{6}}{5-2sqrt{6}}}+sqrt{frac{5-2sqrt{6}}{5+2sqrt{6}}}
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Thực hiện phép tính :
1 ) \(\frac{1}{5+2\sqrt{6}}\)\(+\)\(\frac{1}{5-2\sqrt{6}}\)
2 ) \(\frac{5+\sqrt{5}}{5-\sqrt{5}}\)\(+\)\(\frac{5-\sqrt{5}}{5+\sqrt{5}}\)
3 ) \(\frac{1}{2\sqrt{5}+3\sqrt{2}}\)\(-\)\(\frac{1}{2\sqrt{5}-3\sqrt{2}}\)
4 ) \(\frac{1}{3\sqrt{2}-4}\)\(-\)\(\frac{1}{3\sqrt{2}+4}\)
5 ) \(\frac{1}{\sqrt{7-\sqrt{24}}+1}\)\(-\)\(\frac{1}{\sqrt{7-\sqrt{24}}-1}\)
6 ) \(\frac{\sqrt{3}}{\sqrt{\sqrt{3}+1}-1}\)\(-\)\(\frac{1}{\sqrt{\sqrt{3}+1}+1}\)
7 ) \(\sqrt{\frac{3+\sqrt{5}}{3-\sqrt{5}}}\)\(+\)\(\sqrt{\frac{3-\sqrt{5}}{3+\sqrt{5}}}\)
8 ) \(\sqrt{\frac{5+2\sqrt{6}}{5-2\sqrt{6}}}\)\(+\)\(\sqrt{\frac{5-2\sqrt{6}}{5+2\sqrt{6}}}\)
21 tháng 12 2023 lúc 15:18
Bài 1: Tínha) 5sqrt{8}-4sqrt{27}-2sqrt{75}+sqrt{108} b) 1sqrt{left(3-sqrt{6}right)^2}+sqrt{left(1-sqrt{6}right)^2} c) dfrac{5sqrt{3}-3sqrt{5}}{sqrt{5}-sqrt{3}}+dfrac{1}{4+sqrt{15}} d) dfrac{2sqrt{3-sqrt{5}}left(3+sqrt{5}right)}{sqrt{10}-sqrt{2}}-dfrac{sqrt{15}+sqrt{5}}{sqrt{12}+2} Bài 2: Cho (d₁): y dfrac{1}{2}x-4 và (d₂): y -3x+3 . Vẽ (d₁) và (d₂) trên cùng một hệ trục tọa độ. Tìm tọa độ giao điểm A của 2 đường thẳng trên. Helpp!!
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Bài 1: Tính
a) \(5\sqrt{8}-4\sqrt{27}-2\sqrt{75}+\sqrt{108}\)
b) \(1\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{\left(1-\sqrt{6}\right)^2}\)
c) \(\dfrac{5\sqrt{3}-3\sqrt{5}}{\sqrt{5}-\sqrt{3}}+\dfrac{1}{4+\sqrt{15}}\)
d) \(\dfrac{2\sqrt{3-\sqrt{5}}\left(3+\sqrt{5}\right)}{\sqrt{10}-\sqrt{2}}-\dfrac{\sqrt{15}+\sqrt{5}}{\sqrt{12}+2}\)
Bài 2: Cho (d₁): y = \(\dfrac{1}{2}x-4\) và (d₂): y = \(-3x+3\) . Vẽ (d₁) và (d₂) trên cùng một hệ trục tọa độ. Tìm tọa độ giao điểm A của 2 đường thẳng trên.
Helpp!!