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Show that the curve y =f(x) has exactly two turning points, where f(x)= x^3 - 3x^2 - 24x - 28

This question is about turning points of a curve, these occur when the gradient of a line is zero. In its current form, the equation of the curve tells us nothing about the gradient of the curve; it must be ...
JA
Answered by Joshua A. • Maths tutor
5909 Views

Whats the effective resistance in a parallel and series circuit with a cell and two 12 ohms resistors ?

What do we know about parallel circuits- Total current is equal to sum of the current in the individual branches I T = I 1 + I 2 Component of each branch of a circuit share the same voltage as the cell V 1 =...
SS
Answered by Suwanja S. • Physics tutor
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Can you help me plan an essay with the title: 'Winston Churchill's Iron Curtain Speech started the Cold War'

Yes:The Nature of the Speech, language used.Stalin's ReactionTruman's support for Churchill (Iron Fist approach)No:Winston Churchill had little influence as a politicianTruman Doctrine more influential in cr...
DH
Answered by Daniel H. • History tutor
2820 Views

With reference to his dramatic methods, explain how Shakespeare presents the relationship between King Lear and Cordelia in 'King Lear'.

Within 'King Lear', Shakespeare presents the bond between Lear and his daughter Cordelia both as one born out of familial duty, yet retaining elements of a deeper more emotional bond between father and daugh...
TD
4270 Views

How would you differentiate and integrate 2x^3?

Integration is the opposite of differentiation.First of all take your 2x 3 So in differentiation you would times the power by the coefficient and then minus one from the power.This would give,6x 2 in other w...
SK
Answered by Scarlett K. • Maths tutor
8399 Views