exam Maths Puzzle Numerical Ability

is this relation a function, if so how do I figure domain and range

(-4,4), (-2.2),(0,0),-2,-2)?

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exam Other Question

The sum of an integer and its reciprocal is 82/9. Find the integer.

Could you please show me how to do this? Thanks so much
I would really appreciate it if you could help me out with this problem.

{{{ log( 7, (3x+4)) }}} = {{{ log( 7, (2+2)) }}}