Question

-3,5,13...tentukan U1 dan U15

Answer 1

-3,5,13,...
U1 = -3
b = U2-U1 = 5-(-3) = 5+3 = 8
U15 = U1+(n-1)b
= -3+(15-1)8
= -3+14×8
= -3+112
= 109