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Question #b434a

1 Answer

Dec 10, 2016

#f(9)=-15#

Explanation:

# f(x)=ax^7+bx^5+cx^3-6#

#f(x)=g(x)-6#

where

#g(x)=ax^7+bx^5+cx^3#

is an odd function such that #g(x)=-g(-x)#

Now if #f(-9)=g(-9)-6=3# then

#f(9)=g(9)-6 = -g(-9)-6# but

#g(-9)=9# then

#f(9) = -9-6=-15#

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