2da Tarea [ sucesiOnes & Numeros ]

07/ 09/ 10

Alumna : Cortes Tinajero Sarai
GrupO : 1:4

Turno : MatutinO

1.- a1= -27 d= 2 12 términos


a1 + d = - 27


-27+2= -25+2= -23+2= -21+2= -19+2= -17+2= -15+2= -13+2= -11+2= -9+2= -7+2= -5+2=5-3+2= -1





2.- a1= -34/9 d= 2/3 9 términos



a1+d=34/9+2/3=120/27+2/3=414/81=1404/243=4711/729+2/3=15591/2187+2/3=
                     51147/6561+2/3=166563/19683+2/3=539055/59049+2/3=1735263/177147





3.- a1= 67 d= -3.75 10 términos


a1+d= 67+-3.75=63.25+-3.75=59.50+-3.75=55.75+-3.75=52+-3.75=48.25+-3.75=44.50+-3.75=40.75+-3.75=37+-3.75=33.25+-3.75=29.50




4.- a1= 128.15 d=-12.35 7 términos



n=a1+d=   128.15+-12.35= 115.80+ -12.35= 103.45+ -12.35= 91.10+ -12.35= 78.75+ - 12.35=66.40+ -12.35= 54.05+-12.35=41.70+-12.35=29.35



5.- a1= 63/7 d= -9/7 11 términos


a1+d= 63/7+-9/7=54/7+-9/7=45/7+-9/7=36/7+-9/7=27/7+-9/7=18/7+-9/7=9/7+-9/7=-9/7+-9/7=-18/7+ -9/7=-27/7+-9/7=-36/7+-9/7=-45/7



6. - a1= -3 an= 187 n= -75


sn = (a1+an) n = (-190)(-75) =14250= 7125





7.- a1= 2 an= 215 n= 164


sn = (a1+an) n = (217)(164) = 33588 =16794


2 2 2






8.- a1= 21 an= 276 n= 321

sn = (a1+an) n = (297)(321) = 95337 = 47668.5


2 2 2





9.- a1= -78 d= -49



N=a1+d (n-1)

=78+-49(n-1)
=-127(n-1)
N-1=-127
n=-127+1
n=-128





10.- a1= 345 d= -169



N=a1+d (n-1)
=345+ -169= (n-1)
=-514(n-1)
N - 1= -514
n= -514 + 1
n= -515