CHO Y= 13 X3-MX2-X+M+23 TÌM M SAO CHO (C) CẮT OX TAI X1;X2; X3 THỎA MÃN X12+X22+X32>15

7. - CAU HOI PHU KHAO SAT LUYEN THI DAI HOC NGUYEN GIANG BIEN ND
CAU HOI PHU KHAO SAT LUYEN THI DAI HOC NGUYEN GIANG BIEN ND
7.Cho y= 13 x

3

-mx

2

-x+m+23 Tìm m sao cho (C) cắt Ox tai x

1

;x

2

; x

3

thỏa mãn x

1

2

+x

2

2

+x

3

2

>15