Bn à mắc mớ j pải hỏi như này hả bn???

40x2=80             45x1=45            50x1=50

40x3=120           45x2=90            50x2=100

40x4=160            45x3=135          50x3=150

40x5=200             45x4=180          50x4=200

40x6=240              45x5=225          50x5=250

40x7=280              45x6=270           50x6=300

40x8=320               45x7=315           50x7=350

40x9=360               45x8=360            50x8=400

40x10=400              45x9=405            50x9=450

                                 45x10=450          50x10=500

40 x 4= 160

40 x 5= 200

40 x 6= 240

40 x 7= 280

40 x 8= 320

40 x 9= 360 

40 x 4 = 160 ; 45 x 4 = 180 ; 50 x 4 = 200 ; 40 x 5 = 200 ; 45 x 5 = 225 ; 50 x 5 = 250 ; 40 x 6 = 240 ; 45 x 6 = 270 ; 50 x 6 = 300 ; 40 x 7 = 280 ; 45 x 7 = 315 ; 50 x 7 = 350 ; 40 x 8 = 320  ; 45 x 8 = 360 ; 50 x 8 = 400 ; 40 x 9 = 360 ; 45 x 9 = 405 ; 50 x 9 = 450

mỉnh chỉ phan nữa bài thôi tại mình ko có nhiều thời gian

40x4=160         45x4=180           50x4=200

40x5=200         45x5=225            50x5=250

còn lại pro tự tính đi

Thay x = 25 vào C, ta có: 

\(C=25^7-26\cdot25^6+27\cdot25^5-47\cdot25^4-77\cdot25^3+50\cdot25^2+25-24=-28144\)

P=x3+y3+2xy=(x+y)3−3xy(x+y)+2xy=2013−601xy" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">P=x3+y3+2xy=(x+y)3−3xy(x+y)+2xy=2013−601xy

S=xy=x(201−x)" role="presentation" style="border:0px; direction:ltr; display:inline-table; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">S=xy=x(201−x)

1≤x≤200" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">1≤x≤200

S=200−(x−1)(x−200)≥0⇒Smin=200" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">S=200−(x−1)(x−200)≥0⇒Smin=200

x≤y⇒x≤100" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">x≤y⇒x≤100

S=100.101−(x−100)(x−101)≤100.101⇒Smax=100.101" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">S=100.101−(x−100)(x−101)≤100.101⇒Smax=100.101

bằng 1

f(x)= x^6 - 50x^5+50x^4-50x^3+50x^2-50x+50 tại x=49

<=> \(f_{\left(49\right)}\)= 49^6 - 50.49^5+50.49^4-50.49^3+50.49^2-50.49+50 

<=> \(f_{\left(49\right)}\)= 13519544083, 0396489851

kết quả =

   1 

đs...

\(90+10-50x2+49\)

\(=90+10-100+49\)

\(=100-100+49\)

\(=0+49\)

\(=49\)

450 - 4 x 50 - 50 x 3 - 100

= 450 - 200 - 150 - 100

= 250 - 150 - 100

= 100 - 100

= 0

450-4x50-50x3-100
=450-200-150-100
=0