0 reads0 ratings0 helpful
If (S_n=7875), what is the value of (n)?
Advertisement
Answer and explanation
Correct answer: (125)
(S_{125}=\frac{125\times126}{2}=7875), so (n=125). For large values, using (2S_n) makes identification easier.
Frequently asked questions
What is the correct answer to this question?
(125)
Why is this the correct answer?
(S_{125}=\frac{125\times126}{2}=7875), so (n=125). For large values, using (2S_n) makes identification easier.
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