For which of the following, y can be a function of x?
1. x4=y2
2.y=(log x)2
2621. we get two values of y for a particular x ( y=±x2) hence not a function.
2. we get unique value of y for each x (given x is positive) hence a function
1For root of any square say...√x2 is always modulus of x
hence ur first function is mod y = (mod x)2
for x=1,2,3,4....
we get two values of y....
Hence itz nt a function
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1Thanks for your time guys....
@Aditya
2nd is not a function too.(As per the answer in the book.)
262i think they considered domain to be all real nos.
that is why i included that if given that x is positive , then it will be a function.
