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Show clearly that (3√3)^2 = 27

Show clearly that (3√3) 2 = 27 First of all, the question looks overfacing due to the surds, I can assure you that surds are not scary, they simply act as a means of clearing up messy numbers such as 1.73205...
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Answered by Eleanor C. • Maths tutor
15608 Views

How to solve the absolute-value inequalities?

Absolute value means how far away you are from zero. It's better to draw a number line to understand and solve the question. Given the inequality l 4x+3 l >15 , the distance of the 4x+3 value from 0 must ...
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Answered by Cynthia C. • Maths tutor
9760 Views

What is Taylor Series

Technical Definition: A way to approximate (very) smooth functions (for which derivatives up to high orders exist and are continuous) Simple Definition: Taylor series is the infinite sum of all the terms for...
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Answered by Andrew C. • Maths tutor
11407 Views

Some videos I've made

Prerequisite for addition formula: https://www.youtube.com/watch?v=iHZmi2MHqWc Proof of formula for sin(A+B): https://www.youtube.com/watch?v=BEETggUVMrY Proof of formula for cos(A+B): https://www.youtube.co...
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Answered by Sam G. • Maths tutor
5772 Views

How do I know how many roots a quadratic equation has?

Let ax 2 + bx + c = 0 be the equation in question where a,b,c are real numbers with a not equal to 0 (otherwise we would not have a quadratic). If: b 2 - 4ac > 0 then there are two (real) roots b 2 - 4ac ...
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Answered by Amit G. • Maths tutor
10382 Views