exam Maths Puzzle Numerical Ability

3) Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27� to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer:
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exam Other Question

((((2a^2)^3)))
_________
(3b^3))))

the ^3 applies to the whole problem the line is suppose to implie that 2a^2 is over the bottom. Any help you can give me would be awesome. I need help graphing this system.
x-y is less than or equal to 3

x+2y is greater than or equal to 6

WHat method should I use?