Engineering Economics
What is the factor name of the formula [i(1+i)^n]/[((1+i)^n)-1]?

Uniform gradient future worth
Uniform series sinking fund
Capital recovery
Single payment present worth

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Engineering Economics
Which is NOT an essential element of an ordinary annuity?

The first payment is made at the beginning of the first period.
The amounts of all payments are equal.
Compound interest is paid on all amounts in the annuity.
The payments are made at equal interval of time.

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