3 . The table shows the first four terms of three sequences x n
, y n and z n
. n 1 2 3 4 x n 100 300 500 700 y n 100 300 400 450 z n 100 300 900 2700
( a ) State which sequence is
( i ) arithmetic ;
( ii ) geometric .
( b ) Find the 10th term of the arithmetic sequence .
( c ) Find the sum of the first 10 terms of the geometric sequence .
[ 2 ]
[ 2 ]
[ 2 ]
© SE Production Limited 4 All Rights Reserved 2021