Question
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Suku - suku ke- \( n \) dari barisan \( \left(x_{n}\right) \) ditentukan oleh formula berikut. Tuliskan lima suku pertama dari barisan \( x_{n}=1+(-1)^{n} \) !

Ask by Bartlett Gibbs. in Indonesia
Jan 21,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

The first five terms of the sequence \( x_{n} = 1 + (-1)^{n} \) are: 0, 2, 0, 2, 0

Solution

Untuk menentukan lima suku pertama dari barisan \( x_{n} = 1 + (-1)^{n} \), kita substitusikan nilai \( n \) dari 1 hingga 5 ke dalam rumus tersebut: 1. **Suku ke-1 (\( n = 1 \))**: \[ x_{1} = 1 + (-1)^{1} = 1 - 1 = 0 \] 2. **Suku ke-2 (\( n = 2 \))**: \[ x_{2} = 1 + (-1)^{2} = 1 + 1 = 2 \] 3. **Suku ke-3 (\( n = 3 \))**: \[ x_{3} = 1 + (-1)^{3} = 1 - 1 = 0 \] 4. **Suku ke-4 (\( n = 4 \))**: \[ x_{4} = 1 + (-1)^{4} = 1 + 1 = 2 \] 5. **Suku ke-5 (\( n = 5 \))**: \[ x_{5} = 1 + (-1)^{5} = 1 - 1 = 0 \] Jadi, lima suku pertama dari barisan tersebut adalah: \[ 0, \; 2, \; 0, \; 2, \; 0 \]

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The Deep Dive

Suku-suku pertama dari barisan \( x_{n} = 1 + (-1)^{n} \) dapat dihitung sebagai berikut: - Untuk \( n = 1 \): \( x_{1} = 1 + (-1)^{1} = 1 - 1 = 0 \) - Untuk \( n = 2 \): \( x_{2} = 1 + (-1)^{2} = 1 + 1 = 2 \) - Untuk \( n = 3 \): \( x_{3} = 1 + (-1)^{3} = 1 - 1 = 0 \) - Untuk \( n = 4 \): \( x_{4} = 1 + (-1)^{4} = 1 + 1 = 2 \) - Untuk \( n = 5 \): \( x_{5} = 1 + (-1)^{5} = 1 - 1 = 0 \) Jadi, lima suku pertama dari barisan \( x_{n} \) adalah: 0, 2, 0, 2, 0.

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