exam
Maths Puzzle
Numerical Ability
Using the given equations of parabolas, find the focus, the directrix and the equation of the axis of symmetry.
y=1/20 x^2
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exam Other Question
Please help me solve this simultaneous equation:
log x base 3 = y = log (2x-1) base 9
and another one:
log (x+y) = 0
2 log x = log (y+1)
Prove that:|z|=0 iff z=0.