设数列an前n项和Sn=2n^2,bn为等差数列,且a1=b1,b2*(a2-a1)=b1.设cn=an/bn,求数列c

设数列an前n项和Sn=2n^2,bn为等差数列,且a1=b1,b2*(a2-a1)=b1.设cn=an/bn,求数列cn前n项和
设数列an前n项和Sn=2n^2,bn为等差数列,且a1=b1,b2*(a2-a1)=b1.求数列an和bn通项公式（2）设cn=an/bn,求数列cn前n项和
已知x属于R,x不等于0,n属于N*,求1+3x+5x^2+7x^3+…+(2n-1)x^n-1