Register Now

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 8: x+2011(1/2010+1/2009+1/2008)=x+2011(1/2007+1/2006+1/2005) giải pt

Home/ Toán Lớp 8: x+2011(1/2010+1/2009+1/2008)=x+2011(1/2007+1/2006+1/2005) giải pt

Toán Lớp 8: x+2011(1/2010+1/2009+1/2008)=x+2011(1/2007+1/2006+1/2005) giải pt

Ngọc Quý Tháng Mười 12, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: x+2011(1/2010+1/2009+1/2008)=x+2011(1/2007+1/2006+1/2005) giải pt

Comments ( 1 )

myngocla
12 Tháng Mười, 2022 at 7:19 chiều

Reply

$\\$

(x+2011) (1/2010 + 1/2009 + 1/2008) = (x+2011) (1/2007 + 1/2006 + 1/2005)

⇔(x+2011)/2010 + (x+2011)/2009 + (x+2011)/2008=(x+2011)/2007 + (x+2011)/2006 + (x+2011)/2005

⇔ (x+2011)/2010 + (x+2011)/2009 + (x+2011)/2008 – (x+2011)/2007 – (x+2011)/2006 – (x+2011)/2005=0

⇔ (x+2011) (1/2010 + 1/2009 + 1/2008 – 1/2007 – 1/2006 – 1/2005)=0

⇔x+2011=0

(Do 1/2010 + 1/2009 + 1/2008 – 1/2007 – 1/2006 – 1/2005 \ne 0)

⇔x=-2011

Vậy pt có tập nghiệm : S={-2011}

Leave a reply

About Ngọc Quý