book Maths Puzzle Numerical Ability

Please help me figure out this function.
Let f(x)=x-(2/x), Determine f(3) and f(a+b)
Thanks
Renee

Read Solution (Total 0)

book Other Question

Don has 80 coins. He has 4 times as many dimes as nickels and the remaining are pennies. With a single variable, express the number. *patterns and inductive Reasoning*
fine the next three terms of each sequence

1) 6,8,12,18
2)3,-4,-11,-18
3)-11,-6,-1,-4