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1.问题的提出由公差为d(d≠0)的等差数列{an}与公比为q(q≠1)的等比数列{bn}的对应项的积构成数列{an·bn},求数列{an·bn}的前n项和Sn.
1. The problem is raised by the product of the sequence {an · bn} of the product of the corresponding term of the algebraic sequence {an} of tolerance d (d ≠ 0) and the geometric sequence {bn} of an isometric sequence q (q ≠ 1) , Find the first n terms of {an · bn} and Sn.