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Nauka » Matematyka » Liceum - lekcje
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b)
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2u(x)+4w(x)=2(-x3+x2-6x+8)+4(4x3+6x-7)=
=-2x3+2x2-12x+16+16x3+24x-28
=14x3+2x2+12x-12
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c)
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w(x)-u(x)=4x3+6x-7-(-x3+x2-6x+8)
=4x3+6x-7+x3-x2+6x-8=5x3-x2+12x-15
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d)
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x·w(x)+(x-2)+u(x)=x·(4x3+6x-7)+x-2-x3+x2-6x+8=
=4x4+6x2-7x+x-2-x3+x2-6x+8=4x4-x3+7x2-12x+6
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e)
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3u(x)+2w(x)=3(-x3+x2-6x+8)+2(4x3+6x-7)=
=-3x3+3x2-18x+24+8x3+12x-14
=5x3+3x2-6x+10
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f)
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2u(x)-w(x)=2(-x3+x2-6x+8)-(4x3+6x-7)=
=-2x3+2x2-12x+16-4x3-6x+7
=-6x3+2x2-18x+23
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