Write out the first five terms of the sequence 1n1 n22n1Solu

Write out the first five terms of the sequence.

(-1)^n-1 (n+2/2n-1)

Given that :

An= (-1)^n-1 (n+2/2n-1)

Plug n = 1 , 2 ,3 ,4 ,5

A1 = (-1)^1-1(1+2/2x1-1)

A1= 1 * 3/1

A1= 3

Aagina

A2 = (-1)²^-1(2+2/2x2-1)

A2 = -1 x (4/3) =-4/3

and

A3 = (-1)^3-1(3+2/2x3-1)

A3 = 1 x (5/5) =1

A3= 1

and

A4 = (-1)^4-1(4+2/2x4-1)

= -1 x (6/7)

= -6/7

and

A5= (-1)^5-1(5+2/2x5-1)

= 1 x (7/9)

= 7/9