Top answers

What are the most important points to consider when carrying out my EPQ?

The crux of an EPQ is that it is there not only to test your skills in your chosen product (i.e. fluency, coherency, depth of analysis etc in a project where the product is an essay) but also to test many of...
RB
11351 Views

Show that the following system of equations has an infinite number of solutions. x+y+2z = -2; 3x-y+14z=6; x+2y=-5

Substitute values of one equation into another. (1) x+y+2z = -2; (2) 3x-y+14z=6; x+2y=-5 (3). Substitute x in (1) and (2) from (3). We get -y+2z=3 in (1). We get -7y+14z=21 in (3). Since (3) is (1)*7, we can...
ES
Answered by Egidijus S. • Maths tutor
8135 Views

When the polynomial 3x^3 +ax+ b is divided by x−2 , the remainder is 2, and when divided by x +1 , it is 5. Find the value of a and the value of b.

Insert the negative values of the divisors and put them into the polynomial. x-2 -> P(2) = 3 4+2a+b=2 x+1 -> P(-1)=3 (-1)+(-1)a+b=5. 22+2a+b=0 -8-a+b=0, then solve the simultaneous equations and obtain...
ES
Answered by Egidijus S. • Maths tutor
18773 Views

Name several sort algorithms of an array, their working principles and their efficency.

Bubble sort (compare two elements and switch them if one of them is higher than other, depending on ordering preference), iterate over the whole array of elements. Efficency O(n 2 ). Insert sort, make a sepa...
ES
3182 Views

Name the memories in the computer and rate them by the amount of space and their price. When should which be used.

Processor memory (cache), RAM (Random Access Memory), Hard memory (Hard Drive, Magnetic Tapes, Solid State drive). Processor is fastest, ram is next, hard is slowest. Processor is most expensive, then ram, t...
ES
3410 Views