×

#### Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Click to Chat

1800-1023-196

+91-120-4616500

CART 0

• 0

MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
```
If for a sequence (t n ), S n = 2n 2 +5n, find t n and show that the sequence is an A.P.

```
3 years ago

Arun
25768 Points
```							As we knowFor any sequenceTn = Sn - S(n-1)HenceTn = 2 n² + 5n - [2(n-1)² + 5(n-1)] = 2n² + 5n - 2n² -2 +4n -5n +5= 4n +3 NowT1 = 7T2 = 11T3 = 15Hence this forms an A.P.
```
3 years ago
Think You Can Provide A Better Answer ?

## Other Related Questions on Algebra

View all Questions »

### Course Features

• 731 Video Lectures
• Revision Notes
• Previous Year Papers
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Test paper with Video Solution

### Course Features

• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions