Question

The second term of a g. P are 27 and 7 term is 1/9 find the first term and common ratio

Answer 1

ar=27 and ar^6=1/9
ar=27
a=27/r
ar^6=1/9
27/r×r^6=1/9
27r^5=1/9
r^5=243
r^5=3^5
r =3
put value of r in other equation
ar=27
a(3)=27
a=9
hope its helpful