exam Maths Puzzle Numerical Ability

write as a single logarithm
log2 3+og2 y^5-3log2x

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exam Other Question

Perform the indicated divisions. (2x^3 - 3x^2)+ (4x+ 4)/( 2x+ 1) pleae help me to simplify

(3x^-2/y^-3)-2(x^4/y^6)^2