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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: (1³) + 3*1 - 4(1³)(1³) = 1 + 3 - 4 = 0 = The right hand side of the equation,...

Answered by Harry W. • Maths tutor

3427 Views

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

On aurait dû leur dire la vérité

Answered by Erin B. • French tutor

3003 Views

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

tan(x)/sec²(x) Sec(x) = 1/cos(x), therefore 1/sec(x) = cos(x). also tan(x) = sin(x)/cos(x).using substitution, tan(x)/sec²(x) = (sin(x)/cos(x)) * cos²(x) = sin(x)cos(x). s...

Answered by Olaitan O. • Maths tutor

5219 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 sho...

Answered by Luwaiza M. • Chemistry tutor

17128 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, gl...

Answered by Luwaiza M. • Biology tutor

5058 Views