Tough and Tricky questions: Exponents.
If 3^(x+1)*5^(y-1) = 9^x*125^y, then 2x + y =	Choose the correct answer
A) -3/4 B) -2/5 C) -5/2 D) 2/5 E) 5/2
Here is my solution.   3^(x+1)*5^(y-1) = 9^x*125^y   Here RHS 9^x*125^y= 3^(2x)*5^(3y)   Equating powers on both sides--&gt;   x+1=2x , thus x=-1 and   y-1=3y giving y=-1/2   So, x+y=-5/2   Option: -5/2
<result>C</result>
Tough and Tricky questions: Exponents.
If 3^(x+1)*5^(y-1) = 9^x*125^y, then 2x + y =