exam Maths Puzzle Numerical Ability

If f(x) = 2x^2 + 6x - 5, then
[f(x + h) - f(x)]/h =

a. 6x + 3h - 4
b. 4x + 2h - 3
c. 10x + 5h + 2
d. 10x + 5h - 3
e. 8x + 4h + 5
f. 4x + 2h + 6
g. none of these

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exam Other Question

Write the equation of the line passing through (-1,7) and (-1,1) Change the polar coordinates (4Sqrt2, 3pi/4), to rectangular coordinates.