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Point K(8,-5) lies on the circle x^2 +y^2 - 12x - 6y - 23. find the equation of the tangent at K.

First, find the centre of the circle. Since we know the equation of the circle, we know that the centre (-g,-f) comes from the part of the equation -12x-6y, where -12=2g and -6=2f. Therefore, to get the cent...
CM
Answered by Catriona M. • Maths tutor
2833 Views

Differentiate y = 3x4-8x3-3

y = 3x 4 -8x 3 -3dy/dx = (3 x 4)x 3 -(8 x 3)x 2 dy/dx = 12x 3 - 24x 2
BG
Answered by Bhavya G. • Maths tutor
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Which verbs take the dative case?

While most verbs affect a direct object - so take the accusative - some verbs can take the dative as well as the accusative to indicate an indirect object, such as schreiben [Acc: Ich schreibe einen Brief - ...
GM
Answered by Gabriel M. • German tutor
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Describe the primary, secondary, tertiary and quaternary structure of proteins.

Primary The amine group of one amino acid reacts with the carboxyl group of another during a condensation reaction to form a peptide bond. The products of this reaction are a dipeptide and a water molecule. ...
HD
Answered by Hannah D. • Biology tutor
7698 Views

When would you use perfect tense and when would you use the pluperfect?

The perfect tense is used when in English you would say something has / hasn't happened: for example, 'she has read the book', 'he hasn't finished it yet.' The pluperfect is used when in English you would sa...
AM
Answered by Anna M. • Spanish tutor
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