Top answers

Maths
A Level

Let f(x) = 5x^4 + 6x^3 + 3, find dy/dx at x = 3

First we must differentiate the equation with respect to x. To differentiate you must multiply the coefficient (number in front) by the power of x, then subtract 1 from the power. So here we find dy/dx = ...

FK
Answered by Francesca K. Maths tutor
3605 Views

Differentiate y = x^3 + 2x^2 + 4x + 3

3x+ 2x + 4

BB
Answered by Billy B. Maths tutor
3990 Views

Find the integral of a^(x) where a is a constant

Starting with ∫ax dx ,
We can re-write ax using logs as eln(a)*x using some of their properties
We use the substitution u = ln(a)*x (as such du/dx = ln(a)) all...

AP
Answered by Andreas P. Maths tutor
3496 Views

Solve the differential equation dx/dt=-6*x , given when t=0 x=7.

You start by seperating the variables giving,

(1/x)*dx=(-6)*dt

you then integrate both sides with respect to the variables,

ln(x)=-6*t+c

you then subsitute in the given conditi...

LC
Answered by Lucy C. Maths tutor
8455 Views

integrate x^2 + ln(x)

x^3/3  +  1/x

BM
Answered by Beth M. Maths tutor
3768 Views

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