Given that y = x^2 +2x + 3, find dy/dx.

We use a typical rule for polynomials in the form y = axb , where a and b are real numbers. Also, for a polynomial equation y = axb +cxd +.... , dy/dx = d( axb)/dx + d(cxd)/dx + ...With this information, we can differentiate y = x2 +2x + 3 :dy/dx = d(x2)/dx + d(2x)/dx + d(3)/dx = 2x1 + 2x0 + 0x-1 = 2x + 2.

JC

Related Maths A Level answers

All answers ▸

Solve the equation 3x^2/3 + x^1/3 − 2 = 0


Given that f(x) = 1/x - sqrt(x) + 3. Find f'(1).


Differentiate x^x


Integrate 2x/[(x+1)(2x-4)