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Maths, Addmaths and Statistics: Post your doubts here!

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If we made the equation in the first part using lg would marks be deducted???
It just asked to form the equation and both lg and ln give same answers
for one 2^x=0 is not possible and two
2^x=1
x=0 not in the domain hence no solutions of eq
and domain was transpose of range of f and f^-1 right?
 
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