Math II

// ＭＡＴＨ  ＩＩ    ＳＥＲＩＥ
const Check_MonotoneSeq = (an) => (
  switch (picktest) {

    case DIFFERENCE:

    result = an+1 - an

      if(result > 0)
        return Increasing
      else if(result < 0)
        return Decreasing
    break;

    case RATIO:

    result = an+1/an

    if(result > 1)
        return Increasing
    else if (result <1)
        return Decreasing
    break;

    case DERIVATIVE:

    f (x)diff = an
    result = f(x)

    if(result > 0)
      return Increasing
    else if(result < Decreasing)
      return Decreasing

    break;
    default:
  }

)
const TestGenaral_Term = (picktest) => (
  switch (picktest) {

    case INTERGRAL:
      if(Check_MonotoneSeq(an) == Decreasing){
        if (Integrade f(x) == หาค่าเป็ฯตัวเลขได้)
          CONVERGEN
        else
          DIVERGEN
      }
    break;

    case COMPARISON:
    if(YouCanFindBn == true){
      if( an <= bn && bn == ConV && an == ConV)
        CONVERGEN
      if( an => bn && bn == Div && an == Div)
        DIVERGEN
    }
    break;

    case RATIO:
    let L = lim|an+1/an|
    if(L < 1)
      CONVERGEN
    else if(L > 1)
      DIVERGEN
    else
      FAIL
    break;

    default:

  }
)
 if (|an| == CONVERGEN)
    an abs CONVERGEN
 else if (|an| == DIVERGEN){

    let pick = input();

    if (TestGenaral_Term (pick) == CONVERGEN)
      CONDITIONAL CONVERGEN
    else if (TestGenaral_Term (pick) == DIVERGEN)
      DIVERGEN
}