well, we know that the 2nd term is ar=32
If there are n terms, then we have
ar = 32
a(r^n-1)/(r-1) - a = 63.5
a(r^(n-1)-1)/(r-1) = 127
a = 64
r = 1/2
so the GP is 64,32,16,8,4,2,1, 1/2
8 terms
If the sum of the G.P is 63.5 except for the first term,
sum is 127 except the last one, and
the sum is 31.5 except the first two terms,
then the number of terms in GP Is
1 answer