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

7. Find the sum of 12 terms of an A.P. whose nth term is given by an = 3n + 4 (a) 262 (b) 272 (c) 282 (d) 292

7. Find the sum of 12 terms of an A.P. whose nth term is given by an = 3n + 4
(a) 262
(b) 272
(c) 282
(d) 292

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8741 Points
3 months ago
Answer: a Explaination:Reason: Here an = 3n + 4 ∴ a1 = 7, a2 – 10, a3 = 13 ∴ a= 7, d = 10 – 7 = 3 ∴ S12 = 122[2 × 7 + (12 – 1) ×3] = 6[14 + 33] = 6 × 47 = 282

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