Question

20. If a, b, c are in A.P. then the value of (a + 4b + c)/[b(a? +c?)] is
(c) 3
(d) None
(a) 1
(b) 2.
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Answer 1

Step-by-step explanation:

If a,b,c in ap then 2b=a+c

a+4b+c=6b

and

b(a+c)=2b^2

so answer is 6b/2b^2

3/b

there is some type error as numerator has unit metre and denominator has metre^2

so answer cannot be constant

if consider there is b multiple at numerator than answer is 3

option first(c)