0 reads0 ratings0 helpful
If (S_n=1225), what will be the value of (S_{2n})?
Advertisement
Answer and explanation
Correct answer: (4950)
(1225=S_{49}), so (2n=98) and (S_{98}=\frac{98\cdot99}{2}=4851). The correct option should be (B).
Frequently asked questions
What is the correct answer to this question?
(4950)
Why is this the correct answer?
(1225=S_{49}), so (2n=98) and (S_{98}=\frac{98\cdot99}{2}=4851). The correct option should be (B).
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
Advertisement