यदि \(a_1=150\) और (a_{n+1}=a_n-n(n+2)-1) है तो \(a_4\) क्या होगा?

If \(a_1=150\) and (a_{n+1}=a_n-n(n+2)-1), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (121)

Step 1

Concept

The subtracted values are (4,9,16), so \(a_4=121\). Exam tip: calculate the full subtraction before subtracting.

Step 2

Why this answer is correct

The correct answer is C. (121). The subtracted values are (4,9,16), so \(a_4=121\). Exam tip: calculate the full subtraction before subtracting.

Step 3

Exam Tip

घटने वाले मान (4,9,16) हैं इसलिए \(a_4=121\) है। पूरा घटाव निकालकर ही घटाएँ।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=150\) और (a_{n+1}=a_n-n(n+2)-1) है तो \(a_4\) क्या होगा? / If \(a_1=150\) and (a_{n+1}=a_n-n(n+2)-1), what is \(a_4\)?

Correct Answer: C. (121). Explanation: घटने वाले मान (4,9,16) हैं इसलिए \(a_4=121\) है। पूरा घटाव निकालकर ही घटाएँ। / The subtracted values are (4,9,16), so \(a_4=121\). Exam tip: calculate the full subtraction before subtracting.

Which concept should I revise for this Mathematics MCQ?

The subtracted values are (4,9,16), so \(a_4=121\). Exam tip: calculate the full subtraction before subtracting.

What exam hint can help solve this Mathematics question?

घटने वाले मान (4,9,16) हैं इसलिए \(a_4=121\) है। पूरा घटाव निकालकर ही घटाएँ।