a) What annual expenditure for 12 years is equivalent to spending $1,000 at the end of the first year, $1,500 at the end of the 5th year, and $2,000 at the end of the 9th year, if the interest is at 8% per annum?   b) What single amount paid at the beginning of the first year is equivalent to the series of unequal payments in (a), with interest at 8%?

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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a) What annual expenditure for 12 years is equivalent to spending $1,000 at the end of the first year, $1,500 at the end of the 5th year, and $2,000 at the end of the 9th year, if the interest is at 8% per annum?

 

b) What single amount paid at the beginning of the first year is equivalent to the series of unequal payments in (a), with interest at 8%?

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