Can someone explain to me what I'm doing wrong here?
My attempt:
Let
be the number of years of service. Then
/left(/dfrac{1.04^{t-1}+1.04^{t-2}+1.04^{t-3}}{3}/right)[1-0.05(20-t)]%20=%200.017t^2(50,000)(1.04)^{t-1}/left(/dfrac{1+1.04^{-1}+1.04^{-2}}{3}/right))
for integers 
and(1.04)^{t-1})
for integers 
.
Then(1.04)^{t-1}/left(/dfrac{1+1.04^{-1}+1.04^{-2}}{3}/right)}{(50,000)(1.04)^{t-1}}%20=%200.017t^{2}/left(/dfrac{1+1.04^{-1}+1.04^{-2}}{3}/right)%20/geq%200.25%20/Longrightarrow%20t^{2}%20/geq%2015.28627853%20/Longrightarrow%20t%20/geq%203.90)
giving the solution of 4 years of service. This obviously isn't right.
What am I doing wrong here?
My attempt:
Let
and
Then
giving the solution of 4 years of service. This obviously isn't right.
What am I doing wrong here?
SOA WA 21
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