Top answers

Critically evaluate the role of the protagonist in Go Tell It in the Mountain

John tries to forge his own personal identity outside of his community. Described as a ‘black Bildungsroman’, Go Tell It ‘is a young protagonists struggle to invent himself’. Baldwin establishes John’s strug...
HG
3767 Views

Find the equation of the straight line passing through the origin that is tangent to the curve y = ln(x).

Firstly, recognise the relevant equations. The two functions are y = mx and y = ln(x). As the straight line is a tangent, we know that at a certain point x 0 , the functions and their gradients are equal. Th...
PS
Answered by Paul S. • Maths tutor
8049 Views

An extract of DNA contains 4000 base pairs. The extract is identified to contain 300 guanine bases. How many adenine bases can be found in the DNA extract?.

3700
KS
2601 Views

Explain how the physical properties of water enable organisms to survive over a range of temperatures.

Water has a very high specific heat capacity due to the collective forces of the many hydrogen bonds. A lot of energy goes into breaking these bonds rather than raising the temperature of the water, hence pr...
AB
Answered by Arunima B. • Biology tutor
24474 Views

A stationary point of inflection implies a second derivative of 0, does this work the other way around?

No, and we may take a counterexample to see why. If y=x^5+5/3x^4, dy/dx=5x^4+20/3x^3, d2y/dx2=20x^3+20x*2=20x^2(x+1). Setting this to 0 will give us the candidates for a POI, but not all these numbers will b...
TR
Answered by Toby R. • Maths tutor
4206 Views