exam Maths Puzzle Numerical Ability

Please help with this problem. Thanks in advance.

Given:
A scientist was hired to determine which brand of toothpaste is more effective in preventing cavities in children. Thir

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exam Other Question
Which of the following sets of vectors are linearly independent?

A) [0 0], [-3 2]

B) [6,-7]

C) [3,2,0], [4,-7,-8], [9,-6,5]

D) [-8,2,0], [9,6,0], [-7,-5,0]

E) [-9 Expression 1: 2log(x+1)
Expression 2: 2log(2+x)
Expression 3: 4+log2+3logx

How would the sum of these 3 expressions be written as a single logarithm?

thanks in advance