SPM Students Discussion Thread V3, New Thread: End of an Era!!
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 Nov 26 2006, 05:41 PM
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#1
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Senior Member
1,193 posts Joined: Jan 2003 From: Sungai Petani   
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y=-0.5x^2-2x+6
=-0.5(x^2+4x-12) =-0.5(x^2+4x+4-16) =-0.5(x+2)^2+8 m+2=0 m=-2 8=3m^2+n 8=12+n n=-4 err... i think i got the wrong answer... can anyone help me check and seee....... |
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Nov 26 2006, 06:30 PM
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#2
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Senior Member
1,193 posts Joined: Jan 2003 From: Sungai Petani
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I think the answer is m=-2, n=-4
i did both ways and i got the same answer.... |
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Nov 26 2006, 06:35 PM
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#3
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Senior Member
1,193 posts Joined: Jan 2003 From: Sungai Petani
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(PKD)
y=-0.5x^2-2x+6 =-0.5(x^2+4x-12) =-0.5(x^2+4x+4-16) =-0.5(x+2)^2+8 m+2=0 m=-2 8=3m^2+n 8=12+n n=-4 (Pembezaan) dy/dx=-2-x 0=-2-m m=-2 3m^2+n=6-2m-0.5m^2 12+n=6+4-2 n=-4 |
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