=(3/4)^0+(3/4)^1+……+(3/4)^(n-1)+……
=lim(n→∞)(3/4)^0*[1-(3/4)^n]/(1-3/4)
=lim(n→∞)4[1-(3/4)^n]
0
高等数学-级数求和等比级数 的和s=__________.
=(3/4)^0+(3/4)^1+……+(3/4)^(n-1)+……
=lim(n→∞)(3/4)^0*[1-(3/4)^n]/(1-3/4)
=lim(n→∞)4[1-(3/4)^n]
0