IXL - Introduction to partial sums (Precalculus practice)

Find the first three partial sums of the series.

Write your answers as integers or fractions in simplest form.

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Find the first three partial sums of the series.

–

Write your answers as integers or fractions in simplest form.

A sequence is an ordered list of numbers. This list can have a finite number of terms or infinitely many terms.

A series is the sum of a sequence of numbers.

The

partial sum

(

)

of a series is the sum of its first

terms.

Look at the series.

–

The first partial sum,

is just the first term.

–

The second partial sum,

is the sum of the first two terms.

–

The third partial sum,

is the sum of the first three terms. Since

is the sum of the first two terms,

can be found by adding

and the third term.

–

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