Bài 1: Căn bậc hai
Các câu hỏi tương tự
Rút gọn : P= \(\dfrac{\sqrt{3}}{\sqrt{\sqrt{3}+1}-1}-\dfrac{\sqrt{3}}{\sqrt{\sqrt{3}+1}+1}\)
Rút gọn :C= \(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
D=\(\sqrt{2-\sqrt{3}}-\sqrt{2+\sqrt{3}}\)
Đề:Chứng minh biểu thức
a) (2√3 - 13) = 13 - 4√3
b) (2 + √5)^2 = 4 + 4√5
c) 7-2√6=(√6-1)^2
d) 19+6√2=(3√2+1)√2
e) 33-20√2=(2√3-5)^2
f)21-4√17=(2-√17)^2
a,\(\left(\sqrt{27}-\sqrt{12}-\sqrt{108}-\sqrt{192}\right):\sqrt{3}\)
b,\(\frac{\sqrt{2}-\sqrt{6}}{1-\sqrt{3}}\frac{3+2\sqrt{7}}{1+\sqrt{3}}\)
c,(\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
Rút gọn:
\(A=\sqrt{3+2\sqrt{2}}-\sqrt{6+2\sqrt{2}+2\sqrt{3}+2\sqrt{6}}\)
rút gọn các biểu thức:
a) dfrac{sqrt{15}-sqrt{6}}{sqrt{35}-sqrt{14}}
b) dfrac{sqrt{10}+sqrt{15}}{sqrt{8}+sqrt{12}}
c) dfrac{2sqrt{15}-2sqrt{10}+sqrt{6}-3}{2sqrt{5}-2sqrt{10}-sqrt{3}+sqrt{6}}
d) dfrac{sqrt{2}+sqrt{3}+sqrt{6}+sqrt{8}+sqrt{16}}{sqrt{2}+sqrt{3}+sqrt{4}}
e) dfrac{x+sqrt{xy}}{y+sqrt{xy}}
f) dfrac{sqrt{a}+asqrt{b}-sqrt{b}-bsqrt{a}}{ab-1}
giải giúp mjk vs m.n :]] arigatou 3
Đọc tiếp
rút gọn các biểu thức:
a) \(\dfrac{\sqrt{15}-\sqrt{6}}{\sqrt{35}-\sqrt{14}}\)
b) \(\dfrac{\sqrt{10}+\sqrt{15}}{\sqrt{8}+\sqrt{12}}\)
c) \(\dfrac{2\sqrt{15}-2\sqrt{10}+\sqrt{6}-3}{2\sqrt{5}-2\sqrt{10}-\sqrt{3}+\sqrt{6}}\)
d) \(\dfrac{\sqrt{2}+\sqrt{3}+\sqrt{6}+\sqrt{8}+\sqrt{16}}{\sqrt{2}+\sqrt{3}+\sqrt{4}}\)
e) \(\dfrac{x+\sqrt{xy}}{y+\sqrt{xy}}\)
f) \(\dfrac{\sqrt{a}+a\sqrt{b}-\sqrt{b}-b\sqrt{a}}{ab-1}\)
giải giúp mjk vs m.n :]] arigatou <3
rút gọn các biểu thức sau:
a,\(\sqrt{\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}}\)
b,\(\sqrt{6+2\sqrt{5}-\sqrt{29-12\sqrt{5}}}\)
c,\(\sqrt{2+\sqrt{5-\sqrt{13-\sqrt{48}}}}\)
d,\(\left(3-\sqrt{5}\right)\sqrt{3+\sqrt{5}}+\left(3+\sqrt{5}\right)\sqrt{3-\sqrt{5}}\)
\(\sqrt{15-\sqrt{216}}+\sqrt{33-12\sqrt{6}}\)
= \(\sqrt{\left(3-\sqrt{6}\right)^2}+\sqrt{\left(3-2\sqrt{6}\right)^2}\)
= \(3-\sqrt{6}+3-2\sqrt{6}\)
a.\(\sqrt{15+6\sqrt{6}}\)
b.\(\sqrt{17-12\sqrt{2}}+\sqrt{17+12\sqrt{2}}\)
c. \(\sqrt{3-2\sqrt{2}}+\sqrt{4-2\sqrt{3}}-\sqrt{7-4\sqrt{3}}\)
1. Tính
a) frac{3-sqrt{3}}{sqrt{3}}
b)frac{2sqrt{2}+sqrt{6}}{4+sqrt{12}}
c)frac{1-sqrt{a^3}}{a-1}
d)frac{sqrt{6+2sqrt{5}}}{sqrt{5}+1}
e)frac{sqrt{5+2sqrt{6}}}{sqrt{3}+sqrt{2}}
2. Rút gọn
frac{1}{sqrt{1}+1}-frac{2sqrt{x}-2}{xsqrt{x}-sqrt{x}+x-1}
Đọc tiếp
1. Tính
a) \(\frac{3-\sqrt{3}}{\sqrt{3}}\)
b)\(\frac{2\sqrt{2}+\sqrt{6}}{4+\sqrt{12}}\)
c)\(\frac{1-\sqrt{a^3}}{a-1}\)
d)\(\frac{\sqrt{6+2\sqrt{5}}}{\sqrt{5}+1}\)
e)\(\frac{\sqrt{5+2\sqrt{6}}}{\sqrt{3}+\sqrt{2}}\)
2. Rút gọn
\(\frac{1}{\sqrt{1}+1}-\frac{2\sqrt{x}-2}{x\sqrt{x}-\sqrt{x}+x-1}\)