exam Maths Puzzle Numerical Ability

Express the given quantity as a single logarithm.
ln(1+x^9)+ 1/2 ln(x)-ln(sin(x))

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exam Other Question

-x/3=3 SOLVE

Ive tried multiplying both sides by 3 and then multiplying the top number by 3 and solving and its still not working.. PLEASE let me know what im doing wrong : Determine the domain of the function f(x) = sqr 6-x

A. all real numbers
B. all positive real numbers
C. x 6
D. x < 6