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9 tháng 9 2021

 GTNN của biểu thức : A= (x-1)^2021 + (x-2)^2022

Là   MAX A = 1  khi  \(\orbr{\begin{cases}x=1\\x=-1\end{cases}}\)

17 tháng 12 2021

a) \(M=2022-\left|x-9\right|\le2022\)

\(maxM=2022\Leftrightarrow x=9\)

b) \(N=\left|x-2021\right|+2022\ge2022\)

\(minN=2022\Leftrightarrow x=2021\)

26 tháng 12 2022

A = (x+5)2022 + | y - 2021| + 2022

vì ( x+5)2022 \(\ge\) 0; 

    |y-2021|   \(\ge\) 0

    2022      = 2022

Cộng vế với vế ta được : A = (x+5)2022+|y-2021|+2022\(\ge\) 2022

Vậy A(min) = 2022 dấu bằng xảy ra khi : \(\left\{{}\begin{matrix}x+5=0\\y-2021=0\end{matrix}\right.\)=>\(\left\{{}\begin{matrix}x=-5\\y=2021\end{matrix}\right.\)

1 tháng 1 2022

T a space c ó colon space A equals open vertical bar x minus 2021 close vertical bar plus open vertical bar x minus 1 close vertical bar equals open vertical bar 2021 minus x close vertical bar plus open vertical bar x minus 1 close vertical bar
equals greater than A greater or equal than open vertical bar 2021 minus x plus x minus 1 close vertical bar equals open vertical bar 2020 close vertical bar equals 2020 space v ớ i space m ọ i space x
D ấ u space equals space x ả y space r a space less than equals greater than open curly brackets table attributes columnalign left end attributes row cell 2021 minus x greater or equal than 0 end cell row cell x minus 1 greater or equal than 0 end cell end table less than equals greater than open curly brackets table attributes columnalign left end attributes row cell x less or equal than 2021 end cell row cell x greater or equal than 1 end cell end table close close
less than equals greater than 1 less or equal than x less or equal than 2021
V ậ y space v ớ i space 1 less or equal than x less or equal than 2021 space t h ì space A space c ó space G T N N equals 2020

Tham khảo:

T a space c ó colon space A equals open vertical bar x minus 2021 close vertical bar plus open vertical bar x minus 1 close vertical bar equals open vertical bar 2021 minus x close vertical bar plus open vertical bar x minus 1 close vertical bar
equals greater than A greater or equal than open vertical bar 2021 minus x plus x minus 1 close vertical bar equals open vertical bar 2020 close vertical bar equals 2020 space v ớ i space m ọ i space x
D ấ u space equals space x ả y space r a space less than equals greater than open curly brackets table attributes columnalign left end attributes row cell 2021 minus x greater or equal than 0 end cell row cell x minus 1 greater or equal than 0 end cell end table less than equals greater than open curly brackets table attributes columnalign left end attributes row cell x less or equal than 2021 end cell row cell x greater or equal than 1 end cell end table close close
less than equals greater than 1 less or equal than x less or equal than 2021
V ậ y space v ớ i space 1 less or equal than x less or equal than 2021 space t h ì space A space c ó space G T N N equals 2020

A(1/2^2022)=1/2^2022+1/2^4044+...+1/2^(2022^2021)

=>2^2022*A=1+1/2^2022+...+1/2^(2022^2020)

=>A*(2^2022-1)=1-1/2^(2022^2021)

=>\(A=\dfrac{2^{2022^{2021}}-1}{2^{2022}-1}\)

1: \(M=0\)

mà \(\left\{{}\begin{matrix}\left(x-2021\right)^{2022}>=0\\\left(2021-y\right)^{2020}>=0\end{matrix}\right.\)

nên x-2021=0 và 2021-y=0

=>x=2021 và y=2021

4 tháng 4 2022

cảm ơn bạn nhiều nha