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Maths
GCSE

How do you know what to do first when solving composite function?

So when you're solving a composite function you carry out the function closest to the 'x' first. It is useful to think of a composite function as the function of a function. Let me demonstrate with an exa...

MF
Answered by Molly F. • Maths tutor
2935 Views

64^-1/3

64-1/3= 1/641/3= 1/4

TK
Answered by Tanner K. • Maths tutor
2662 Views

Express x*2 + 10x - 3 in the form (x+p)*2 + q

Step 1 - half the "x" coefficient = +5 Therefore p = +5 and place in brackets (x+5)2Step 2 - square the value of p and subtract 5*2 = 25 (x+5)2 - 25Step 3 - add the numbe...

CS
Answered by Chloe S. • Maths tutor
4392 Views

£X was invested for 5 years, earning compound interest of 2% per year. After 5 years the total value of the investment was £11,040.81. How do I calculate the value of the invested amount £X?

We know that to calculate the final value V of an investment of £X after t years, earning an interest rate of r

VP
Answered by Vishal P. • Maths tutor
3398 Views

Simplify fully (y+3)^2

Firstly expand the brackets to make (y+3)(y+3)Next I find it easy to remember that you don't times anything together that's in the same bracket when expanding. So - y x y = y^2y x 3 = 3y3 x y = 3y3 x 3 = ...

LC
Answered by Laura C. • Maths tutor
4986 Views

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