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y=x^2 +4x-12, Find the Range (co-domain) when the domain of x is (1) -6 to 2 inclusive (2) the set of real numbers, R.

This question usually comes up at AS level where students have prior knowledge of quadratic functions:We need to 1) understand the 'shape' 2) locate the roots 3) Find the turning point 4) sketch the graph...

Answered by Pascal T. • Maths tutor

3082 Views

Why does gravitational potential energy have a negative value?

A point in a gravitational field has an associated gravitational potential. It is defined as the work done required to bring a unit mass from a point an infinite distance to that point in the field. At an...

Answered by Joseph P. • Physics tutor

3713 Views

The distinction between the imperfect tense and the passé composé

The imperfect tense and the passé composé are both past tenses which are used in different situations. The imperfect tense is used in three main cases:Habitual actions-> What

Answered by Assunta S. • French tutor

1756 Views

Describe how B-lymphocytes respond when they are stimulated by antigens.

When B-lymphocytes are stimulated by antigens, they first divide by mitosis to form clones, some of which become plasma cells that secrete antibodies, others become memory B-cells which can be stimulated ...

Answered by • Biology tutor

20694 Views

“Memories, even your most precious ones, fade surprisingly quickly." - How does Ishiguro present narration in Never Let Me Go?

Engage with the quote - dealing with memory, and the unreliability of it2) Link that to the unreliability of narration in Never Let Me Go, and how far we can trust Kathy H.3) Reasons for unreliabili...

Answered by • English tutor

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