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olechka199812
@olechka199812
November 2021
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m11m
Verified answer
1)
f(x)=xlnx
f(0.5)=0.5 ln0.5
f ' (x)=x' lnx+x*(lnx)' =lnx + x*(1/x)=lnx + 1
f ' (0.5)=1+ln0.5
y=0.5 ln0.5 + (1+ln0.5)(x-0.5)=
= 0.5 ln0.5+x+xln0.5 - 0.5 - 0.5 ln0.5=
= (1+ln0.5)x - 0.5 - уравнение касательной.
2)
f(x)=ln(x²+2x)
f(2)=ln(2² +2*2)=ln8
y=ln8+0.75(x-2)=0.75x+ln8-1.5 - уравнение касательной.
0 votes
Thanks 2
olechka199812
2 там не совсем ясноэ
m11m
обновите страницу
olechka199812
спасибо огромное
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Answers & Comments
Verified answer
1)f(x)=xlnx
f(0.5)=0.5 ln0.5
f ' (x)=x' lnx+x*(lnx)' =lnx + x*(1/x)=lnx + 1
f ' (0.5)=1+ln0.5
y=0.5 ln0.5 + (1+ln0.5)(x-0.5)=
= 0.5 ln0.5+x+xln0.5 - 0.5 - 0.5 ln0.5=
= (1+ln0.5)x - 0.5 - уравнение касательной.
2)
f(x)=ln(x²+2x)
f(2)=ln(2² +2*2)=ln8
y=ln8+0.75(x-2)=0.75x+ln8-1.5 - уравнение касательной.