Question

find the first four partial sums of the series.
11 - 11 + 11 - 11 + 11 - 11 + ...
write your answers as integers or fractions in simplest form.
s₁ =
s₂ =
s₃ =
s₄ =

Explanation:

Step1: Find \( S_1 \)

The first partial sum \( S_1 \) is the first term of the series. The series starts with 11, so \( S_1 = 11 \).

Step2: Find \( S_2 \)

The second partial sum \( S_2 \) is the sum of the first two terms. The first two terms are \( 11 - 11 \), so \( S_2 = 11 + (-11) = 0 \).

Step3: Find \( S_3 \)

The third partial sum \( S_3 \) is the sum of the first three terms. The first three terms are \( 11 - 11 + 11 \), so \( S_3 = 11 + (-11) + 11 = 11 \).

Step4: Find \( S_4 \)

The fourth partial sum \( S_4 \) is the sum of the first four terms. The first four terms are \( 11 - 11 + 11 - 11 \), so \( S_4 = 11 + (-11) + 11 + (-11) = 0 \).

Answer:

\( S_1 = 11 \)
\( S_2 = 0 \)
\( S_3 = 11 \)
\( S_4 = 0 \)