book Maths Puzzle Numerical Ability

If 4^(1/5) = x, then

a. x * x * x * x * x = 4
b. 1/(x * x * x * x * x) = 4
c. 4 * 4 * 4 * 4 * 4 = x
d. 1/(4 * 4 * 4 * 4 * 4) = x

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book Other Question

solve the inequality graph the solution

-4/5r<8
please help me perform the indicated operation and simplify

-8x + 6 over x plus -6x + 5 over 8x


and


x over x^2-16 minus 5 over x^2+5x+4