f(x)=3x³+2x 求f(2),f(-2),f(2)+f(-2)的值
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f(x)=3x³+2x 求f(2),f(-2),f(2)+f(-2)的值
f(x)=3x³+2x 求f(2),f(-2),f(2)+f(-2)的值
f(x)=3x³+2x 求f(2),f(-2),f(2)+f(-2)的值
f(2)=3*2^3+2*2=28
f(-2)=-20
f(-2)+f(2)=8
额 ∵f(x)=3x³+2x ∴f(2)=28 f(-2)=-28 f(2)+f(-2)=0