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Find the definite integral of f(x) = 12/(x^2+10x+21) with limits [-1,1]. Give your answer to 2 decimal places.

Factorising denominator of fraction: x^2 + 10x + 21 = (x+3)(x+7) 2) Partial fractions: f(x) = 12/(x+3)(x+7) ; let f(x) = A/(x+3) + B/(x+7) then equating the nominator: A(x+7) + B(x+3) = 12 From this we can s...
CG
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Explain what is meant by optical isomerism.

Stereoisomers are molecules that have the same structural formula, but a different arrangement of the atoms in space.Optical isomers are a type of stereoisomers where the two molecules have non-superimposabl...
EW
Answered by Emily W. • Chemistry tutor
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What do I need to do to apply for medical school?

To apply to medical school a lot of the steps are what you'd be expected to do for applications to other subjects, but there are some extra steps as well. Here is a breif overview of the kinds of steps you c...
AS
1694 Views

Describe how plants living in dry conditions may be adapted to their environment.

Long/deep roots, stomata in pits, rolled leaves, tiny hairs on leaves, no leaves (cacti).
EP
Answered by Emily P. • Biology tutor
3080 Views

find the root or roots of the following equation: 2x^2 + 18x + 36

finding the roots, means to find the coordinates at which the curve intersects the X axis. At first look you may notice that each function in the equation is divisible by 2, you can do this to make solving t...
JH
Answered by Jason H. • Maths tutor
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