Thank you for registering.

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

Please check your email for login details.
Close
MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

⇐ BackProceed to Checkout ⇒
There are no items in this cart.
Continue Shopping

If a 1, a 2, a 3, .....,a n are in A.P. such that a 4 -a 7 +a 10 =m,then the sum of first 13 terms of the A.P. is: OPTIONS: 10m 12m 13m 15m

If a1, a2, a3,.....,an are in A.P. such that a4-a7+a10=m,then the sum of first 13 terms of the A.P. is:
OPTIONS:
  • 10m
  • 12m
  • 13m
  • 15m
  •  

Grade:12th Pass

2 Answers

Sandeep Bhamoo
443 Points
3 years ago
a4 - a7+a10 = a1+3d+a1+9d-a1-6d =a1+6d =m. Now sum of first 13 terms = (13/2)(2•a1+12d) =13m. Please do approve my answer if correct
ASh
62 Points
3 years ago
please do reply for my other questions also.

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

Other Related Questions on Magical Mathematics[Interesting Approach]

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Register ICAT

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More