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What is (2/3)^(-1/3)?

We can split this power into two bits - the negative sign and the fraction. Let's deal with the negative sign first and forget about the fraction. So a negative always means '1 over', or the fancy word for t...
OR
Answered by Oliver R. • Maths tutor
5004 Views

How do you multiply an "number" with powers for example a^3 * a^6

When multiplying powers: we add the powers together (3+6) so we get a^9 When dividing powers: we subtract the powers so a^6/a^3 =(6-3)= a^3 When adding or subtracting them we do not change the power. We must...
BS
Answered by Bryony S. • Maths tutor
4745 Views

y=6x+2 Find the gradient of the line and the y intersect

y=mx+c where m = gradient and c = the y-intersect hence gradient= 6 and y-intersect=2
HB
Answered by Hugh B. • Maths tutor
4646 Views

y= 6x + 2, Find the gradient of the line and the y-intersect

y=mx+c where m is the gradient and c is the y-intersect hence gradient=6 and y-intersect = 2 . this can also be found by differentiating the equations dy/dx = 6 and setting x=0 to find the y value.
HB
Answered by Hugh B. • Maths tutor
9898 Views

If x^2 = 16, why isn't the answer just x = 4?

You're right that x = 4 is a solution to the equation - but the problem is it's not the only solution, x = -4 also works.You have to be careful not to take a shortcut by simply taking the square root of both...
LD
Answered by Laurie D. • Maths tutor
18850 Views