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delfin17
@delfin17
July 2022
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помогите! даю много баллов!
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армения20171
S(t)=-1/3*t³+3t²+7t
1)v(t)=s'(t)=-t²+6t+7
2)v(2)=-4+12+7=15
3)v(t)=0
-t²+6t+7=0
t²-6t-7=0
D=36+28=64=8²
t=(6±8)/2
t1=7
t2=-1;это не подходит
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Answers & Comments
1)v(t)=s'(t)=-t²+6t+7
2)v(2)=-4+12+7=15
3)v(t)=0
-t²+6t+7=0
t²-6t-7=0
D=36+28=64=8²
t=(6±8)/2
t1=7
t2=-1;это не подходит