求a的值!
509500(1+a)^(-1)+610944.45(1+a)^(-2)+727996.95(1+a)^(-3)+865467.21(1+a)^(-4)+1040103....
509500(1+a)^(-1)+ 610944.45(1+a)^(-2)+ 727996.95(1+a)^(-3)+865467.21(1+a)^
(-4)+1040103.05(1+a)^(-5)=0 展开
(-4)+1040103.05(1+a)^(-5)=0 展开
1个回答
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用 matlab 求解。
solve('509500*(1+a)^(-1)+610944.45*(1+a)^(-2)+ 727996.95*(1+a)^(-3)+865467.21*(1+a)^(-4)+1040103.05*(1+a)^(-5)=0')
或者 solve('509500*(1+a)^(4)+610944.45*(1+a)^(3)+ 727996.95*(1+a)^(2)+865467.21*(1+a)+1040103.05=0')
求得 a 的四个解分别为:
-1.9683951215516539320169921086165-0.70460485119837966038478093562110*i
-1.9683951215516539320169921086165+0.70460485119837966038478093562110*i
-0.63115782251115274119203635065725-1.1345854003921720620197555604640*i
-0.63115782251115274119203635065725+1.1345854003921720620197555604640*i
solve('509500*(1+a)^(-1)+610944.45*(1+a)^(-2)+ 727996.95*(1+a)^(-3)+865467.21*(1+a)^(-4)+1040103.05*(1+a)^(-5)=0')
或者 solve('509500*(1+a)^(4)+610944.45*(1+a)^(3)+ 727996.95*(1+a)^(2)+865467.21*(1+a)+1040103.05=0')
求得 a 的四个解分别为:
-1.9683951215516539320169921086165-0.70460485119837966038478093562110*i
-1.9683951215516539320169921086165+0.70460485119837966038478093562110*i
-0.63115782251115274119203635065725-1.1345854003921720620197555604640*i
-0.63115782251115274119203635065725+1.1345854003921720620197555604640*i
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