Msaada 3c)

Msaada 3c)

Mia saba

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Tc=200 + 24y2 + 4y3 + y4

dtc/dy= 48y + 12y2 + 4y3

dtc2/dy2 = 48 + 24y + 12y2

Tafuta thamani ya 'y'
 
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