exam Maths Puzzle Numerical Ability

For the exponential function e^x and logarithmic function log x, graphically show the effect if x is doubled.

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exam Other Question

-x-(13+4x) = -3(5-9x)+2 Add or subtract as indicated. Simplify the result, if possible.
{4x/x + 5 + 20.x + 5}
{3x^ + 2x/x - 1 - 10x - 5/x - 1}
{x/x - 2 + x - 4/2 - x}