exam Maths Puzzle Numerical Ability

The graph of the function f(x)=1/x is shown below. Find the equation and graph the function g(x) which is the reflection of f(x)in the y-axis. The graph has to curves in quadrant 1 and 3. I don;t know how to do this and am looking for help with this.

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exam Other Question

The question is:

Evaluate. Cube is outside the square root symbol and negative 125 is inside. How do I solve this problem? Any assistance is appreciated.

Thank you.
the answer i get does not match with the answer i was given, can you help?
multiply...

-3a^2b over 35a^5 multiplied by 14a^3b^2 over -9b^4