Respostas

2014-04-29T22:36:08-03:00
X²-7x+10
delta= 49-4.1.10
=49-40
=√9=3

+7+ou- 3/2 
10/2=5
4/2=2

P.A
(2,5,...)
a1= 2; r= 3
a10=a1+9r
a10=2+9.(3)

a10=29