Solve.
-One approximation for $\pi$ is the infinite sum $\sum_{i=1}^{\infty}\left[(-1)^{i}+1 \cdot \frac{4}{2 i-1}\right]$. Find the sum of the first 9 terms, rounded to the nearest hundredth.
A) 3.22
B) 3.28
C) 3.25
D) 3.24

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The Answer of Solve.
-One approximation for $\pi$ is the infinite sum $\sum_{i=1}^{\infty}\left[(-1)^{i}+1 \cdot \frac{4}{2 i-1}\right]$. Find the sum of the first 9 terms, rounded to the nearest hundredth.
A) 3.22
B) 3.28
C) 3.25
D) 3.24

Solve -One Approximation For \pi π\piπ Is the Infinite Sum ∑i=1∞[(−1)i+1⋅42i−1]\sum_{i=1}^{\infty}\left[(-1)^{i}+1 \cdot \frac{4}{2 i-1}\right]∑i=1∞​[(−1)i+1⋅2i−14​]

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-One Approximation For \pi $\pi$ Is the Infinite Sum $\sum_{i=1}^{\infty}\left[(-1)^{i}+1 \cdot \frac{4}{2 i-1}\right]$