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Mathematics 21 Online
OpenStudy (anonymous):

help here make the curve y=ax^4+bx^3+cx^2+dx+e have a critical point at (0,3) and have an inflection point at (1,2) with inflection tangent 6x+y=8

OpenStudy (anonymous):

what the monkey is an "inflection tangent"?

OpenStudy (anonymous):

YEAH THATS THE CASE WHAT ON EARTH IS INFECTION TANGENT HA!? hahah its on my book god...

myininaya (myininaya):

i just figured it meant the slope of y''

OpenStudy (anonymous):

o?

myininaya (myininaya):

i mean the equation of the tangent line of y'' at (1,2)

myininaya (myininaya):

but i could be wrong since i never heard of one

myininaya (myininaya):

but we need find values for a,b,c,d above

OpenStudy (anonymous):

i have the answer here... a=9 b =-22 c=12 d=3

myininaya (myininaya):

lol

OpenStudy (anonymous):

but i dont know how to do xD

myininaya (myininaya):

d=3 is what i got but i failed at the other values

OpenStudy (anonymous):

o my... oops d= 0 e= 3

OpenStudy (anonymous):

a=9 b =-22 c=12 d=0 e =3

myininaya (myininaya):

oh wait i did make a mistake

myininaya (myininaya):

let me try this again i want to watch tv but i will see what i can figure out

OpenStudy (anonymous):

because it has critical point at (0.3) then y'=4ax^3+3bx^2+2cx+d substitute leads to 0=d

myininaya (myininaya):

yep e=3 for sure

myininaya (myininaya):

i will be back ok

OpenStudy (anonymous):

ok

myininaya (myininaya):

i'm still stuck on the inflection tangent i just don't know what that is every way i tried to think of what it means it doesn't work out

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