Arithmetic progression || Arithmetic sequence
Question:
Determine the first term of AP whose common difference is -8 and the 10th term is 240.
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https://www.youtube.com/watch?v=TgXD-c3S6B8
In the adjoining figure, it is given that AD//BC and BD//CE. Prove that the area of triangle ABC= Area of triangle BDE.
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https://www.youtube.com/watch?v=OFUJmepX_Tc
The diagonals of a parallelogram bisect each other.
Geometry Theorem:
The line joining the two end points of two equal and parallel line segment to opposite sides bisect each other: https://youtu.be/hrjmcBDgDp0
-~-~~-~~~-~~-~-
Please watch: "If ?^?.?^?=(?^? )^?, show that ?/?+?/?=??−?."
https://www.youtube.com/watch?v=rZcUcisuYSc
-~-~~-~~~-~~-~-
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https://www.youtube.com/watch?v=_EUIXBD5vEw
Find the derivative by using the ∆-definition.
Using the ∆-definition, find the derivative of the function f(x)= 2x^2-3x+5.
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https://www.youtube.com/watch?v=oXeib6bQ92c
Height and Distance: Model 1
A pillar of ??√? m high was fixed in the center of circular pond. The angle of elevation of its top was found to be 〖??〗^?, when observed from point of the circumference of the pond. Find the diameter of the pond.
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https://www.youtube.com/watch?v=pt94L0sG8U0