Thank you for registering.

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

Please check your email for login details.
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

find the sum of the n terms of the series (3)(5)+(4)(7)+(5)(9)+---------------------

find the sum of the n terms of the series (3)(5)+(4)(7)+(5)(9)+---------------------

Grade:12

2 Answers

JAYAVARDHAN BAIRABATHINA
35 Points
7 years ago

apply the airthmatic and geometric progression concept....!

vamsi
43 Points
7 years ago

3,4,5 ... are in A.P

a=3,d=1

nth term of A.p=n+2

5,7,9 ...are in A.P

a=5,d=2

nth term of A.P=2n+3

nth term of given series=(n+2)*(2n+3)

sum of given series=sigma[(n+2)*(2n+3)]

                          =n/6(4n^2+9n+41)

please approved my answer.

Think You Can Provide A Better Answer ?

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

ASK QUESTION

Get your questions answered by the expert for free