exam Maths Puzzle Numerical Ability

Find any number for which the rational expression is undefined.
8y-4/7x=21x2

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exam Other Question

If f(x)=x(x+3)(x-1), use interval notation to give all values of x where f(x)>0.

If f(x)=x(x-1)(x-4)^2, use interval notation to give all values of x where f(x)>0.

Find the q Please find the unknown in the equation using steps

log2 1056 = log2(2^a+5 plus 2^a)

Please note that the 2 in the "log2 1056" is small