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The equation kx^2+4kx+5=0, where a is a constant, has no real roots. Find the range of possible values of k.

First, if k=0 then the equation has no real roots since in this case we would have 5=0 (this is a proof by contradiction). A quadratic equation of the form ax^2+bx+c=0 has no real roots if the discriminant b...
EN
Answered by Emily N. • Maths tutor
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Outline the process of synaptic transmission (8)

The process of synaptic transmission is when electrical nerve impulses, known as action potentials, travel from the dendrites of the cell (the receptor site) to the axon terminal. When these action potential...
GS
5637 Views

Qu'aimes-tu faire pendant ton temps libre?

Lorsque j'ai du temps libre, j'aime lire des romans d'aventures, me promener dans la nature ou bien cuisiner des desserts! En effet, je prépare souvent des gâteaux avec ma mère: elle me montre ce qu'il faut ...
DK
Answered by Daria K. • French tutor
15817 Views

How do you differentiate?

Say you have the term y=3X 2 . You start by bringing the power down and placing it in front of the 3 so they multiply like so y=2x3X 2 then next you take one away from the power like so y=2x3X 1 . This can t...
AY
Answered by Alex Y. • Maths tutor
3866 Views

Calculate the concentration, in mol dm-3, of a solution of chloric (I) acid, HOCl , which has a pH of 4.23. Chloric acid is a weak acid, with Ka = 3.72 x 10^-8

[H+] = 10^-4.232) [H+]^2 = Ka x [HA]3) [HA] x Ka = (3.467368505 x 10^-9)4) [HA] = 0.0932
AA
Answered by Afshaun A. • Chemistry tutor
6953 Views