exam Maths Puzzle Numerical Ability

Find the vertex, focus, and directrix of the parabola given by each equation. Sketch the graph.

18. 3x+y^2+8y+4=0

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exam Other Question

I wasn't sure where to categorize induction but I'm really confused on these two questions.
1) Using the Principle of Mathematical Induction, verify that
For every integer n &
Problem:
Find the slope of the line through the given points

(2,4), (6,3)