(本栏目内容,在学生用书中以活页形式分册装订!)一、选择题1(1x)(1x)2(1x)3(1x)nb0b1xb2x2bnxn,且b0b1b2bn62,则n等于()A4B5C6 D7解析:令x1,得b0b1b2bn2222n2n12.622n12,n5.答案:B答案:B3设(5x)n的展开式的各项系数之和为M,二项式系数之和为N,若MN240,则展开式中x3的系数为()A150 B150C500 D500解析:据题意M4n,N2n,故4n2n240,(2n)22n2400,2n16,n4.答案:B答案:C5已知(x1)15a0a1xa2x2a15x15,则a0a1a2a7等于()A215 B214C28 D27答案:B答案:C二、填空题7若n展开式中各项系数和为1 024,则展开式中含x的整数次幂的项共有_项解析:令x1,得22n1 024210.n5.即有3项含x的整数次幂的项答案:3答案:1809(x1)3(x2)8a0a1(x1)a2(x1)2a8(x1)8,则a6_.解析:(x1)3(x2)8(x1)23(x1)18,a6(1)228.答案:28三、解答题.w。w-w*k&s%5¥u高考资源网w。w-w*k&s%5¥u