Question

Hallar 25vo termino de -6, -3, 0
hallar 11vo termino de 1, 4/5, 3/5
hallar 29votermino de -1,-4,-7
xfavor ayudenme
son progresiones algebraicas

Answer 1

Fórmula:

An = a + (n-1)r
a = primer término
r = razón
n = número de término

1)
a = -6
r = 3

A(25) = -6 + (25-1)3
A(25) = -6 + (24)3
A(25) = -6 + 72
A(25) = 66

2)
a =1
r = -1/5

A(11) = 1 + (10)(-1/5)
A(11) = 1 - 2
A(11) = -1

3)
A(29) = -1 + 28(-3)
A(29) = -1 -84
A(29) = -85