vou admitir que o regime de capitalização seja composta
M = C* ( 1 + i )^t
M = C + J
C + J = C* ( 1 + i )^t
(C + J)/C = ( 1 + i )^t
1 + i = [(C + J)/C]^(1/t)
i = [(C + J)/C]^(1/t)-1
i = [(24000+1080)/24000]^(1/6)-1
i = (25080/24000)^(1/6)-1
i = (1,045)^(1/6)-1
i = 1,007-1
i = 0,0073 = 0,73%
