Question

7: 7. The sum of n terms of an AP is 2n2 + 5n and its common difference is 6, then its first
0
05
O2
07​

Answer 1

Answer:

sum of n terms= 2n2+5n (given)

therefore, a= 2(1)2+5(1)

= 2+5=7

option (d)07 is the first term of the given AP

Answer 2

Answer:

(d). 7is the correct answer.

Step-by-step explanation:

because the sum of 1st term is equal to the first term.

so if we put n=1 then the sum is to be 7 so it's first term is 7!!!!

hope it will help you!!!