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A curve C has the following equation: x^3 + 3y - 4(x^3)*(y^3) a) Show that (1,1) lies on C b) Find dy/dx

a) Substituting the coordinate (1,1) into the left hand side of the equation for C we obtain: (1 3 ) + 3*1 - 4(1 3 )(1 3 ) = 1 + 3 - 4 = 0 = The right hand side of the equation, hence the equation is satisfi...
HW
Answered by Harry W. • Maths tutor
3711 Views

Translate this sentence into French- They should have been told the truth

On aurait d û leur dire la vérité
EB
Answered by Erin B. • French tutor
3229 Views

show that tan(x)/sec2(x) = (1/2)sin(2x)

tan(x)/sec 2 (x) Sec(x) = 1/cos(x), therefore 1/sec(x) = cos(x). also tan(x) = sin(x)/cos(x).using substitution, tan(x)/sec 2 (x) = (sin(x)/cos(x)) * cos 2 (x) = sin(x)cos(x). sin(x+y) = sin(x)cos(y) + cos(x...
OO
Answered by Olaitan O. • Maths tutor
5502 Views

Regarding the first ionisation energies, why do the values shown on the graph go down from magnesium to aluminium and then rise again from aluminium to silicon

The first ionisation energy of an element is the energy required in order to remove the outermost electron from the element to make it an ion with the charge +1. From magnesium to aluminium the values shown ...
LM
Answered by Luwaiza M. • Chemistry tutor
17700 Views

What is the role of the kidneys and how does it function to do its job?

The main role of the kidney is to filter the blood, to remove toxins like urea and then via various methods, parts of the kidney are able to reabsorb many of these filtered substances back for example, gluco...
LM
Answered by Luwaiza M. • Biology tutor
5341 Views