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If you draw a circle with radius one, centre origin, draw a right angled triangle within the circle in the top right quadrant, so that the hypotenuse is also a radius of the circle, label the angle clockw...

2x + 5 lnx

U_{n+1}=1/U_{n} where U_{1}= 2/3First of all, we need to find U_{2} and U_{3} and so on, up until we notice a pattern in the answers. U_{2} = 1/(2/3) = 3/2U...

Int() in this case will refer to integralsAnswer is: f(x)=(1-x^2)/(1+x^2)=(2-(1+x^2)/(1+x^2)=-1+2/(1+x^2)=> Int(f(x))=Int(-1+2/(1+x^2))=Int(-1)+2Int(1/(1+x^2))=-x+2tan^-1(x)+C

Is it integration or differentiation? Differentiation What rule do we use? Since it's a fraction, use the quotient rule Is the rule in the formula book? Yes Identify what u and v equal ...