跨期预算约束

def solve(income_1, income_2, interest_rate):
    pv_income = income_1 + income_2 / (1 + interest_rate)
    return {"现值收入": round(pv_income, 2), "最大消费1": round(pv_income, 2), "最大消费2": round(pv_income * (1 + interest_rate), 2)}