@yetnt/ump/dist/functions/GeometricPattern.js

A very useless math package for your complex javascript projects

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 *
 * @param n The term number (not zero indexed)
 * @param a The first term
 * @param r The constant ratio.
 */
function findTerm(n, a, r) {
    return a * Math.pow(r, n - 1);
}
/**
 *
 * @param n The term number (not zero indexed)
 * @param nn
 * @param a The first term
 * @param r The constant ratio.
 */
function findTerms(n, nn, a, r) {
    let termIndex = n;
    const ans = [];
    while (termIndex != nn + 1) {
        ans.push(a * Math.pow(r, n - 1));
        n++;
        termIndex++;
    }
    return ans;
}
/**
 *
 * @param num1 The first number
 * @param num2 The second number
 * @param num3 The third number
 */
function findNthTerm(num1, num2, num3) {
    const nums = [num1, num2, num3];
    const r = nums[1] / nums[0];
    const rCheck = nums[2] / nums[1];
    if (r !== rCheck) {
        throw new Error("Pattern is not a geometric pattern.");
    }
    const a = num1;
    const formula = `${a} * ${r}^(n - 1)`;
    return { a, r, formula };
}
/**
 * Gemotric pattern functions
 */
exports.default = { findTerm, findTerms, findNthTerm };
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