Question

seja a P.A (a1, a2, a3,...) com a1= -16 e a2 = -13 calcule

a- (a1, a3, a5,...)

b- (a2, a4, a6,...)

Answer 1

a₁=-16                 r= a₂-a₁⇒-13-(-16) ⇒r=-13+16 ⇒3
a₂=-13
a₃= a₂+r = -13+3=-10
a₄=a₃ + r =-10+3=-7
a₅=a₄+r   =-7+3=-4
a₆=a₅+r= = -4 +3=-1        PA= (-16,-13,-10,-7,-4,-1)