Question

if 2^x=5^y=10^-z then the value of (1/x+1/y+1/z)is
(A) 3
(B) -2
(C) 5
(D) O​

Answer 1

Answer:

a

a

b

b

c

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dddddddddfffff

Answer 2

Ans:

2^x cannot be = 5^y as it is not divisible by 5 so it cannot be divisible even by 10^-z

so let x=0 and y=0 and z=0

so after adding we will get the ans as

(D) 0

or else infinity

or else the question is incorrect