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The curve C is given by the equation x^4 + x^2y + y^2 = 13. Find the value of dy/dx at the point (-1,3). (A-level)

The most important thing to note about this question is that we must differentiate implicitly. We must differentiate each term with respect to x. Using our differentiation rules we can see that our first ...

Answered by Riya K. • Further Mathematics tutor

3538 Views

How many atoms are there in 0.75 mol of water? Give answer to 2 decimal places

Number of particles of water = avogadro constant x amount in molTherefore6.02 x10²³ x 0.75= 4.515 x10²³There are 3 atoms in every molecule of water so we need to multiply the number ...

Answered by Alicia R. • Chemistry tutor

4060 Views

What is the significance of the number e (Euler's number)?

The irrational number e is one of the most important numbers in mathematics. The value of it is 2.718... but since it is irrational that is e to 4 significant figure, only. How can we calculate this numbe...

Answered by Soleiman A. • Maths tutor

5210 Views

Explain why relations between the USA and USSR worsened in the years 1947-49.

The USA and USSR had been allies during WWII, but this relationship soon broke down and worsened in the late 1940s. One of the main reasons for this was the announcement of the Truman Doctrine in March 19...

Answered by Beatrice M. • History tutor

6161 Views

If -3x + 10y = -100 and 13x + 10y = 60, solve for x and y.

This can be solved simultaneously. This is about manipulating the equations until they're in a format that you can use.Label the equations:eq1: -3x + 10y = -100 and eq2: 13x + 10y = 60Now, eq1 - eq2 gives...

Answered by Olyvia J. • Maths tutor

3435 Views