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Subject :IMO    Class : Class 8

If ax = by = cz and b2 = ac, then y equals

A
B
C
D


I kinda need help with this sum, i use the formula a^x = b^y = c^z = k, but is there any other simple way to do this particular sum? I have done sums like these before but this one is a little tricky

Ans 1:

Class : Class 8

Ans 2:

Class : Class 9

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