d, \(1000:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-\left(4.125-4.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)

\(=1000:\left[250:\left(450-400\right)\right]\)

\(=1000:\left(250:50\right)=1000:5=200\)

Chúc bạn học tốt!!!

Ta có : \(1000:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-\left(4.5^3-4.5^2\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-4.5^2\left(5-1\right)\right]\right\}\)

\(=1000:\left[250:\left(450-400\right)\right]\)

\(=1000:\left(250:50\right)\)

\(=1000:5=200\)

Chúc bạn học tốt ^^

1+2.( 1/2-1/3+1/3-1/4+....+1/(x-1)-1/x+1)=3/2

1+2.(1/2-1/x+1)=3/2

1-2/x+1=3/2-1

tự tính

Bài này là cơ bản luôn đó:
= 3.(1/1.2 + 1/2.3+...)
= 3.(1/1-1/2+1/2-1/3...)
(tự viết nốt và tính)

100:{250:[450-(4.5³-2².25)}]

=100:{250:[450-(500-100)]}

=100:{250:[450-400]}

=100:{250:50}

=100:5

=20

ai nhanh đúng thì đc 2 hoặc 3 k nhoa

100.{250:[325-(4.5³-2².50)]}

=100.{250:[325-(4.125-4.50)]}

=100.{250:[325-(500-200)]}

=100.{250:[325-300]}

=100.{250:25}

=100.10

=1000

100 . { 250 : [ 325 - ( 4 . 5³ - 2² . 50 )]}
= 100 . { 250 : [ 325 - ( 4 . 125 - 4 . 50)]}
= 100 . { 250 : [ 325 - ( 500 - 200 )]}
= 100 . { 250 : [ 325 - 300 ]}
= 100 . { 250 : 25 }
= 100 . 10
= 1000

100:{250:[450-(4.5³-2².25)]}

=100:{250:[450-(4.125-4.25)]}

=100:{250:[450-(500-100)]}

=100:{250:[450-400]}

=100:{250:50}

=100:5=20

100:{250:[450-(4.5³-2².25)]}

=100:{250:[450-(4.125-4.25)]}

=100:{250:[450-(500-100)]}

=100:{250:[450-400]}

=100:{250:50}

=100:5=20