Asked by Muhmmed sheu
on @ Gp.the 4th term exceed 3rd term by 72 nd 3rd term exceeds 2nd term by 24.fnd the frst four term of the progressn.
Answers
Answered by
Steve
just use what you know about GPs:
ar^3 = ar^2+72
ar^2 = ar+24
So,
ar^2(r-1) = 72
ar(r-1) = 24
Now divide and you have r=3
So, a=4
and the GP is 4,12,36,108
ar^3 = ar^2+72
ar^2 = ar+24
So,
ar^2(r-1) = 72
ar(r-1) = 24
Now divide and you have r=3
So, a=4
and the GP is 4,12,36,108