當(dāng)x=0時(shí),|y|=|c|≤1,①
當(dāng)x=
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當(dāng)x=1時(shí),|y|=|a+b+c|≤1,③
由①②③,可得:
|a|=4|(
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|b|=4|(
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∴≤8+8+1=17,
當(dāng)a=8,b=8,c=1時(shí)取等號;
當(dāng)a=-8,b=8,c=-1時(shí)也取等號.
∴最大值為17;
故選D.
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