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Differentiate 3x^2 + 4x - 7

In order to differentiate a number, 2 steps are needed to be made. The first is to reduce the power of the number by 1 and then multiply that value to the first number. I will run you through the given quest...
JR
Answered by James R. • Maths tutor
6017 Views

Find the positive solution to the equation (x^2+9x+18)/(x^2-9)=10

If we first factorise the top and the bottom of the equation we can see that the top is equal to (x+6)(x+3) and the bottom is (x-3)(x+3). This means we can divide the top and bottom by (x+3) giving us a resu...
JR
Answered by Joseph R. • Maths tutor
3487 Views

(e*sqrt(e))/cuberoot(e^2)=e^k find k

This an indices question. What you need to do is simplify the left hand side so that you have e to some power and that will give you k. You can start with the rule that square roots and cube roots are 1/the ...
TD
Answered by Tamanna D. • Maths tutor
3574 Views

Find the points where the curve given by: y = x^2 - 4x -12, and the line given by y = 2x - 12

They intersect at (0, -12) and (6, 0)
RV
Answered by Rufus V. • Maths tutor
3100 Views

John invests £8000 at compound interest rate of 1.5% per year. He wants to earn more than £2000 in interest. What is the LEAST time in WHOLE years that this will take?

Step 1) Create the formula: 8000 x 1.015 n Step 2) Equate to the target value: 8000 x 1.015 n = 2000 10000 (Common mistake is to use target of £2000 but you must also take into account the £8000 that is alre...
HH
Answered by Hamza H. • Maths tutor
3925 Views