How To Calculate Fibonacci Extensions using TypeScript?

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function generateFibonacciSequence(terms: number): number[] {
    let sequence: number[] = [0, 1];

    for (let i = 2; i < terms; i++) {
        sequence[i] = sequence[i - 1] + sequence[i - 2];
    }

    return sequence;
}

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function calculateFibonacciExtensions(fibonacciSequence: number[], extensionLevel: number): number[] {
    let extensions: number[] = [];

    for (let i = 0; i < fibonacciSequence.length; i++) {
        extensions.push(fibonacciSequence[i] * extensionLevel);
    }

    return extensions;
}

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const fibonacciSequence = generateFibonacciSequence(10);
const fibonacciExtensions = calculateFibonacciExtensions(fibonacciSequence, 1.618);

console.log('Fibonacci Sequence:', fibonacciSequence);
console.log('Fibonacci Extensions (1.618):', fibonacciExtensions);