整式的加减 (15 17:26:8)已知Y=a*x^5+b*x^3+c*x-5,当X=-3时,Y=7,那么X=3时,求Y的值

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整式的加减(1517:26:8)已知Y=a*x^5+b*x^3+c*x-5,当X=-3时,Y=7,那么X=3时,求Y的值整式的加减(1517:26:8)已知Y=a*x^5+b*x^3+c*x-5,当X

整式的加减 (15 17:26:8)已知Y=a*x^5+b*x^3+c*x-5,当X=-3时,Y=7,那么X=3时,求Y的值
整式的加减 (15 17:26:8)
已知Y=a*x^5+b*x^3+c*x-5,当X=-3时,Y=7,那么X=3时,求Y的值

整式的加减 (15 17:26:8)已知Y=a*x^5+b*x^3+c*x-5,当X=-3时,Y=7,那么X=3时,求Y的值
X=-3时
y=a*(-3)^5+b*(-3)^3-3c-5
=-(a*3^5+b*3^3+3c)-5
=7
a*3^5+b*3^3+3c=-12
x=3时
y=a*3^5+b*3^3+3c-5=-12-5=-17

a*(-3)^5+b*(-3)^3+c*(-3)-5=7
a*3^5+b*3^3+c*3=-12
a*3^5+b*3^3+c*3-5=-17
X=3时,Y=-17

x=-3时
y=-3^5a-3^3b-3c-5=7
那么3^5a+3^3b+3c=-12
x=3时
y=3^5a+3^3b+3c-5
=-12-5
=-17

-17
a*x^5+b*x^3+c*x是奇函数,x=-3时的值与x=3的值互为相反数,x=-3时y=7,
a*x^5+b*x^3+c*x为12,则x=3时值为-12,带入Y=a*x^5+b*x^3+c*x-5就得-17