Toán Lớp 9: Rút gọn:
C=\sqrt{2+\sqrt{3}-\sqrt{2-\sqrt{3}
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 9: Rút gọn:
C=\sqrt{2+\sqrt{3}-\sqrt{2-\sqrt{3}
Comments ( 2 )
C=sqrt{(2.(2+sqrt{3}))/2}-sqrt{(2.(2-sqrt{3}))/2}
C=sqrt{(4+2sqrt{3})/2}-sqrt{(4-2sqrt{3})/2}
C=sqrt{((sqrt{3})^2+2.sqrt{3}.1+1^2)/2}-sqrt{((sqrt{3})^2-2.sqrt{3}.1+1^2)/2}
C=sqrt{(sqrt{3}+1)^2/2}-sqrt{(sqrt{3}-1)^2/2}
C=|(sqrt{3}+1)/sqrt{2}|-|(sqrt{3}-1)/sqrt{2}|
C=(sqrt{3}+1)/sqrt{2}-(sqrt{3}-1)/sqrt{2}
C=(sqrt{3}+1-sqrt{3}+1)/sqrt{2}
C=2/sqrt{2}
C=sqrt{2}
Vậy C=sqrt{2}