exam Maths Puzzle Numerical Ability

6x^3+2x^2-4x+2/3x-1

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exam Other Question

The sides of a triangle form a geometric sequence. What are the limits of the ratio? The amount of a radioactive tracer remaining after t days is given
by A = A0 e-0.058t, where A0 is the starting amount at the beginning of
the time period. How many days will it take for one half of the
original amount to decay?