Question

Selesaikan barisan geometri berikut ;

U2 =10
U6 = 10
U9 ?

Answer 1

U6=ar^5=10
U2=ar =10
------------------- :
r⁴=1
r=1

ar=10
a=10/1
a=10

U9=ar^8=10×1^8=10×1=10

Answer 2