Comprehension The numbers \( a, b \), and \( c \) are between 2 and 18 , such that (i) their sum...

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Comprehension
The numbers \( a, b \), and \( c \) are between 2 and 18 , such that
(i) their sum is 25
(ii) the numbers 2, \( a \), and \( b \) arc consecutive terms of an A.P.
(iii) the numbers \( b, c, 18 \) are consecutive terms of a G.P.
Roots of the equation \( a x^{2}+b x+c=0 \) are
(a) Real and positive
(b) Real and negative
(c) Imaginary
(d) Real and of opposite sign
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