Updates angular/hlsFinance.md

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Updates angular/hlsFinance.md
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37a16a0e · JingChao · ee87c5c6 · 37a16a0e
Commit 37a16a0e authored Sep 08, 2017 by JingChao
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 ##### 一、PMT计算公式
+ - 需要传递的参数如下
+ ```javascript
+ /**
+         *
+         * @param ir  interest rate per month
+         * @param np  number of periods (months)
+         * @param pv  present value
+         * @param fv  future value (residual value)
+         * @returns {number} 计算结果;
+         * @constructor
+         */
+        PMT: function (ir, np, pv, fv, type) {
+ ```