Question

doar ex 15 a,va rog mult

Answer 1

a)
x2=x1+5=-10+5=-5
x3=x2+5=-5+5=0
x4=x3+5=0+5=5
x5=x4+5=5+5=10

b)
x2=2*x1=2*4=8
x3=2*x2=2*8=16
x4=2*x3=2*16=32
x5=2*x4=2*32=64

Answer 2

-10,-5,0,5,10,...
x2=-10+5=5
x3=-5+5=0
 e o progresie aritmetica cu ratia 5
xindice n=-10 +5(n-1) ....n-o mai demonstrez prin inductie


b)x2= 2*4=8=4*2^1
   x3= 2*8=2*2*4=16=4*26@
   x4= 2*16=32=2*2*2*4=4*2^3
  x5= 2*32=64= 2*2*2*2*4= 4*2^4
 .......................

xindice n=  =4*2^(n-1)  progresie geometrica cu ratia 2
 sau
x indice n =(2^2)*2^(n-1)= 2 ^(n-1+2)= 2^ (n+1)
nu o mai dem prin inductie