Untitled.ipynb

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    "def arith_grad_series ( O , i , n , forward = True ) -> float:\n",
    "    \"\"\"\n",
    "    TODO (need to think)\n",
    "    INPUT:\n",
    "        O : numerical   - the known variable, either G - the gradient factor if forward == True, else A - the worth of each payment at the time of payment\n",
    "        i : numerical   - the interest rate\n",
    "        n : int         - the number of periods the interest compounds\n",
    "        forward : bool  - the direction of worth to be calculated, defaults to True\n",
    "    RETURN:\n",
    "        Z : numerical - G(  ( 1 / i ) - n / ( ( 1 + i )^n - 1 )  ), the neccessary value of A\n",
    "                        else A/(  ( 1 / i ) - n / ( ( 1 + i )^n - 1 )  ), the gradient value G.\n",
    "    \"\"\"\n",
    "    return O * (  ( 1 / i ) - n / ( ( 1 + i ) ** n - 1 )  ) if forward else O / (  ( 1 / i ) - n / ( ( 1 + i ) ** n - 1 )  )"
   ]
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     "data": {
      "text/plain": [
       "140.32526073035547"
      ]
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   "source": [
    "arith_grad_series ( 200 , 0.06168 , 4 , False )"
   ]
  },
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   "execution_count": null,
   "metadata": {},
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   "source": []
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