Question

plz anyone answer this question it will be a great help for me​

Answer 1

Answer:

0 is the answer.

Step-by-step explanation:a(n) =a+ (n-1)d

a(12) = a+(12-1)d

-12 =a+11d

or a=11d +12....... eq1

Now a(1)+a(2)+a(3)+a(4)= 24 (given)

a+a+d+a+2d+a+3d =24

From eq1 putting the value of a we get d=-2

which means a= 9

Sum=10/2(2*9+(10-1)-2) =0