A=x5 - 100x4 100x3 -100x2 100x -9 vs x= 99 giải từng bước hộ mình vs,mình gấp lắm roi

Question

A=x^5 - 100x^4 +100x^3 -100x^2 +100x -9 vs x= 99  giải từng bước hộ mình vs,mình gấp lắm roi

ngoclanhoa · Answer

Ta c&oacute;: 99^2-100*99+100   =99*(99-100)+100   =-99+100   =1   A=x^5-100x^4+100x^3-100x^2+100x-9   =x(x^4-100x^3+100x^2-100x+100)-9   =x[x(x^3-100x^2+100x-100)+100]-9   =x{x[x(x^2-100x+100)-100]+100}-9   Thay x=99, ta c&oacute;:   A=99*{99*[99*(99^2-100*99+100)-100]+100}-9   =99*{99*[99-100]+100}-9   =99*{-99+100}-9   =99-9   =90   Vậy A=90 tại x = 99   $  $    bb color{#3a34eb}{ text{@hoanganhnguyen09302}}

A=x^5 – 100x^4 +100x^3 -100x^2 +100x -9 vs x= 99 giải từng bước hộ mình vs,mình gấp lắm roi

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