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Express 21/root7 in the form k root7.

21/root 7 = 21root7/7 = 3root7 k = 3
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Answered by Ally W. • Maths tutor
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Given that y = 5x(3) + 7x + 3, find A) dy/dx B) d2y/dx2

A) 15x 2 +7 B) 30x
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Answered by Ally W. • Maths tutor
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Calculate the equation of a line that passes through the point (2,4) and has a gradient of 1.5 in the form y=mx+c

y-y1=m(x-x1) y-4=1.5(x-2) y-4=1.5x-3 y=1.5x+1
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Answered by Katie H. • Maths tutor
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Given y = 2x^2 + 3x + 2 find dy/dx

To get dy/dx from a formula y in terms of x we must differentiate y with respect to x. Generic formula for term differentiation: d/dx(ax^b) = bax^b-1 = times the coefficient by the power and minus the power ...
AO
Answered by Alex O. • Maths tutor
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Given that 4 sin(x) + 5 cos(x) = 0 , find the value of tan x .

Before we get started with answering the question, it is generally good practice to write down any formulas and equations you know that will help us work through the solution. So what formula do we know that...
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Answered by Varun C. • Maths tutor
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