mình tham gia vs

UKM

\(\frac{-22}{35}>-\frac{22}{177}>\frac{-103}{177}\)

\(\Rightarrow-\frac{22}{35}>-\frac{103}{177}\)

\(\frac{315-x}{101}+\frac{313-x}{103}+\frac{311-x}{105}+\frac{309-x}{107}+4=0\)

\(\Leftrightarrow\left(1+\frac{315-x}{101}\right)+\left(1+\frac{313-x}{103}\right)+\left(1+\frac{311-x}{105}\right)+\left(1+\frac{309-x}{107}\right)=0\)

\(\Leftrightarrow\frac{315-x+101}{101}+\frac{313-x+103}{103}+\frac{311-x+105}{105}+\frac{309-x+107}{107}=0\)

\(\Leftrightarrow\frac{416-x}{101}+\frac{416-x}{103}+\frac{416-x}{105}+\frac{416-x}{107}=0\)

\(\Leftrightarrow\left(416-x\right)\left(\frac{1}{101}+\frac{1}{103}+\frac{1}{105}+\frac{1}{107}\right)=0\)

\(\Leftrightarrow416-x=0\)

\(\Leftrightarrow x=416\)

\(\frac{315-x}{101}+\frac{313-x}{103}+\frac{311-x}{105}+\frac{309-x}{107}+4=0\)

\(\Leftrightarrow\left(\frac{315-x}{101}+1\right)+\left(\frac{313-x}{103}+1\right)+\left(\frac{311-x}{105}+1\right)+\left(\frac{309-x}{107}+1\right)=0\)

\(\Leftrightarrow\frac{315-x+101}{101}+\frac{313-x+103}{103}+\frac{311-x+105}{105}+\frac{309-x+107}{107}=0\)

\(\Leftrightarrow\frac{416-x}{101}+\frac{416-x}{103}+\frac{416-x}{105}+\frac{416-x}{107}=0\)

\(\Leftrightarrow\left(416-x\right)\left(\frac{1}{101}+\frac{1}{103}+\frac{1}{105}+\frac{1}{107}\right)=0\)

Vì \(\left(\frac{1}{101}+\frac{1}{103}+\frac{1}{105}+\frac{1}{107}\right)\ne0\)

\(\Rightarrow416-x=0\Leftrightarrow x=416\)

\(2M=\frac{2^{103}+2}{2^{103}+1}=1+\frac{1}{2^{103}+1}\left(\cdot\right)\)

\(2N=\frac{2^{104}+2}{2^{104}+1}=1+\frac{1}{2^{104}+1}\left(\cdot\cdot\right)\)

\(\frac{1}{2^{103}+1}>\frac{1}{2^{104}+1}\Rightarrow1+\frac{1}{2^{103}+1}>1+\frac{1}{2^{104}+1}\left(\cdot\cdot\cdot\right)\)

Từ\(\left(\cdot\right);\left(\cdot\cdot\right)\&\left(\cdot\cdot\cdot\right)\Rightarrow2M>2N\Leftrightarrow M>N.\)

105 nhe bn!mk giai sau nhe!

Đặt tử số là B=1+2+3+....+105

Số các số hạng của B là

(105-1):1+1=105(số)

Tổng B là:

(105+1)x105:2=5565

Đặt mẫu số là C =1-2+3-4+...+103-104+105

C=(1-2)+(3-4)+...+(103-104)+105

C=-1+(-1)+...+(-1)(52 số hạng) + 105

C=-52 + 105

C=53

Vậy A=\(\dfrac{B}{C}\)=\(\dfrac{5565}{53}=105\)

đặt B=\(\frac{1}{101}+\frac{1}{102}+\frac{1}{103}+...+\frac{1}{150}>\frac{1}{150}+\frac{1}{150}+...+\frac{1}{150}>\frac{50}{150}=\frac{1}{3}\)

đặt C=\(\frac{1}{151}+\frac{1}{152}+\frac{1}{153}+...+\frac{1}{200}>\frac{1}{200}+\frac{1}{200}+\frac{1}{200}+...+\frac{1}{200}>\frac{50}{200}=\frac{1}{4}\)

A=B+C>\(\frac{1}{3}+\frac{1}{4}=\frac{7}{12}\)

vì mọi người trả lời câu hỏi thì được tick thôi bạn,

vì mọi người trả lời câu hỏi thì được tick thôi bạn,

\(\frac{-503}{103}< \frac{-506}{105}\)

-503/103<-506/105