Arithmetic Sequence; 7,14,21,28,35
Finding ;
=
+ (n-1) d
= 7 + (7n-7)
= 7n
Finding ,
=
+ (n-1) d
= 7 + (50-1) 7
= 7 + (49) 7
= 7 + 343
= 350
Finding ;
=
( 2
n – 1 ) d
=
( 14 + (50-1) 7 )
= 25 ( 14 + (49) 7 )
= 25 ( 14 + 343 )
= 25 ( 357 )
= 8925