Question

the sum of the series is -8,-6,-4...n terms is 52. the number of terms n is​

Answer 1

Answer:

I think this is the answer...........I hope it helps you

Answer 2

Answer:

-8, -6, -4....... n ( Given sequence)

here a=-8 , t2=-6 and t3=-4

d=t2-a=-6+8=2

t3-t2=-4+6=2

Here, common difference (d) =2 is constant .

Hence the given sequence is in A. P

Sn=52......... (Given)

therefore, by formula.

Sn=n/2[2a+(n-1) d

52=n/2[2×-8+(n-1) 2

52×2=n[-16+2n-2]

104=n[-18+2n]

104=n-18+2n

104+18=n

122=n

Therefore, Number of terms are 122.

HOPE IT WILL HELP YOU ✌✌✌✌