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For all values of x, f(x) = (x + 1)^2 and g(x) = 2(x-1). Show that gf(x) = 2x(x + 2) and find g^-1(7)

gf(x) means you are applying the function f to x (giving you f(x)) and then you are applying the function g to f(x). Since g(x) = 2(x-1), g(f(x)) =2(f(x)-1). This means after substitution, gf(x) = 2((x+1)...

Answered by Arya P. • Maths tutor

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Give an example of a specialised cell and two specialised adaptations.

Sperm cell: 1) flagellum 2) Abundance of mitochondria

Answered by Tutor516653 D. • Biology tutor

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Solve: 3X - 5 = Y 2X +2 = Y +3

2X +2 = Y + 3 2X -1 = Y3X -5 = Y3X -5 = 2X -1 X -5 = -1 X = 43X -5 =Y 3(4) -5 = Y12 - 5 = Y7 = Y
X = 4 Y = 7

Answered by Tutor516653 D. • Maths tutor

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How would you preform the flame test to identify the presence of Sodium in a solution? (3Marks)

Using a clean nichrome wire dip the loop into the solution 2) Hold the loop in the blue flame of a bunsen burner 3) Observe the colour. In this case it will be Yellow.

Answered by Tutor516653 D. • Chemistry tutor

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y=(6x^9 +x^8)/(2x^4), work out the value of d^2y/dx^2 when x=0.5

The question can be represented by the notation d²y/dx²_|x=0.5, meaning the second derivative of y with respect to x resolved at x=0.5. Since y is in the form f(x)/g(x), th...

Answered by Oscar C. • Further Mathematics tutor

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