book Maths Puzzle Numerical Ability

4 (to the power of)x+1=3 (to the power of)x

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book Other Question

The value for imports for a small Central American country is believed to be growing according to the function

I=15 log(16t+33)

and the value of exports appears to be growing
what is the square root of 3 square root of 72x4 divided by the square root of 2x
Help!! im stuck.