Cinic21
23.05.2021 •
Mathematics
Please help me on this. It would mean a lot to me.
1 ) prove that h²(cot² α - cot² β) = 2α²
2 ) if α=20°, β=30°, AC=360m, find the height of PQ
(i beg for proper answers for these 2 questions please)
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Ответ:
f(x)=(x+1)^2-2 is the minimum and g(x)=-(x-2)^2+1 is the maximum
Step-by-step explanation:
Looking at the graph, (you should be able to graph this) the parabola for f(x)=(x+1)^2-2 is pointing downwards and stops at the vertex. This vertex is negative which is the lowest point possible which makes it the minimum. The parabola for -(x-2)^2+1 is pointing upwards and stops at the vertex which is the highest point possible which makes it the maximum.