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If √512 = 2^x , √15625 = 5^y and √345 = 7^x then what will be the value of x - y + z ?

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If √512 = 2x , √15625 = 5y and √345 = 7x

then what will be the value of x - y + z ?

(1) 4 

(2) 6 

(3) 9 

(4) 3

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1 Answer

+1 vote
by (43.6k points)

Correct option is (2) 6

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