Question

48. x = 1+ a + a² +...co, (lal < 1).
y=1+ b + b2+....0, b) <1),
Then, the value of 1+ ab + a²b2+...oo is
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(a)
(b)
(c)
x+y-1 x+y+1 x-y-1
ху
(d)
x-y+1​

Answer 1

Answer:

the number of time a particular observation of it's called its frequency