Question

18) 1 - 2x + 3x2 - 4x3 + ..., Ixl< 1 is:
(a) (1-x) 2
(b) (1+x)2
(C) (1-x)2
(d) (1+x)2​

Answer 1

Answer:

a=39b=4c= 5 d = 1are there you see from the text book