Question

the sum to n terms of an ap is n(n+3) the common difference​

Answer 1

Answer:

Sum of AP=n/2*(2a+(n-1)d)

Step-by-step explanation:

The above is equal to n(n+3) hence equating both we have

n(n+3)=n/2 (2a+(n-1)d)

2n+6=2a+(n-1)d

2n+6=2a+dn-d

Comparing the equations we have d=2