dapatkan selisih antar suku yg berurutan dan suku ke -15 dri tiapbarisan bilangan berikut: B. 9,7,5,3,.... C.2,5,8,11,..... D.6,3,0,-3,-6,.....??

a)U15 = 1 + (7 × 14)
= 1 + 98
= 99
selisih ( 7 )

b)U15 =9 + (-2 × 14)
= 9 + - 28
= -19
selisih ( -2 )

c)U15 = 2 + (3 × 14)
= 2 + 42
= 44
selisih ( 3 )

d)U15 = 6 + (-3 × 14)
= 6 + - 42
= -36
selisih ( -3 )