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If x=-2,1,2 and the y intercept is y=-8 for y=ax^3+bx^2+cx+d, what is a, b, c and d

a=-2, b=2, c=8, d=-8We know d=-8 from the y interception setting x=0 and y=-8For a, b and c we must construct 3 simultaneous equations from the given information x=-2, 1 and 21.) -8a+4b-2c=82.) a+b+c=83.)...

JS
Answered by Joseph S. Maths tutor
3164 Views

Will they expect me to know everything about my subject?

No. In terms of preparation, my best advice is read widely and be passionate. You can't fake passion and that combined with ability is what they look for. They are testing how you think rather than your k...

RW
1457 Views

How do I find the dot product of two 3-dimensional vectors

Example; Let vector v = (2,5,2) and vector u = (1,-2,3),then u · v = [(2 x 1) + (5 x -2) + (2 x 3)] = [2 -10 + 6] = -2 As the workings hopefully make clear in the line above, the general formula for the s...

TV
Answered by Theo V. Maths tutor
1143 Views

What is the best way to learn vocabulary?

My advice is to learn in both directions, for translation especially it is vital to have an active vocabulary rather than simply a passive one. Do whatever helps you, post its, reading, using the words in...

RW
Answered by Robin W. German tutor
835 Views

How do you use the subjunctive?

The subjunctive is used in several different cases, for instance, following the set phrase "bien que" or in expressions of wishing or doubt. The subjunctive is not a tense but a mood, so does no...

RW
Answered by Robin W. French tutor
1598 Views

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