book Maths Puzzle Numerical Ability

whats the sum of the reciprocals of the first three positive even intergers?

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book Other Question

Given f(x)=4x-3 and g(x)=2x(to the power of 2)-5 find f[g(-1)] and g[f(-1)]. Write an equation in slope intercept form of the line that passes through (2,-5) with the slope of -2.