When preparing meals for a 70-year-old, the following four points should be considered:
1. Soft and easy-to-digest food – Ensure that the food is soft and easy to chew and digest to prevent any strain on the digestive system.
2. Low salt and sugar – Limit the amount of salt and sugar in the meals to manage health conditions like hypertension or diabetes.
3. Nutritious and balanced diet – Include a variety of foods rich in essential vitamins, minerals, and proteins to support overall health.
4. Smaller, frequent meals – Serve smaller meals more frequently to avoid over-whelming her digestive system and to maintain steady energy levels.
Assertion (A): The sum of the first fifteen terms of the AP $ 21, 18, 15, 12, \dots $ is zero.
Reason (R): The sum of the first $ n $ terms of an AP with first term $ a $ and common difference $ d $ is given by: $ S_n = \frac{n}{2} \left[ a + (n - 1) d \right]. $
Assertion (A): The sum of the first fifteen terms of the AP $21, 18, 15, 12, \dots$ is zero.
Reason (R): The sum of the first $n$ terms of an AP with first term $a$ and common difference $d$ is given by: $S_n = \frac{n}{2} \left[ a + (n - 1) d \right].$