book Maths Puzzle Numerical Ability

(log x)^2=2log x I believe that this problem is true. Am I right?

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book Other Question

400 people were surveyed before a vote for a referendum. 300 of the 400 said yes.expess this as an equivalent ratio in simplest form. 1; let v be the space of all polynomials over a field F of degree less or equal to 3
let D be a diff. operator from v to v
1; find the matrix A of D with respect to the basis {1,,x,x.x,x.x.x} of v .