Recent content by ronho1234

yes i meant S100 and J is from the first part Calculate J= the integral from 0-100 x^3/2dx which i found to be 40000 i think which leads onto the next two questions

yes i kind of understand what you mean... but since pi/2 is a boundary how do i know if its a max or min do i substitute it back into g(x) and g'(x) if so i get -pi/4 and -1 respectively sorry i still don't quite get it, could you please show me hot to work it out

this is a riemann sum question and i need help with part 2 let Sn denote the finite sum 1+2^ 3/2 +...+n^ 3/2 i) use suitable upper and lower riemann sums for the function f(x)=x^3/2 on the interval [0,100] to prove that S99<J<100 ummm i did this and found 40000<J<41000 II) hence, or...

i know this is a basic calculus question, but i can't seem to get two answers. G(x) = 1/2 x^2sin2x+1/2 xcos2x - 1/4 sin2x find the maximum and minimum values for G(x) on the interval [0,pi/2] i found G'(x)= x^2 cos2x and i know that there is a global max at pi/4 but i can't find the...

ehild the question tells me my lines are in parametric vector form where l1 is represented as r1=i+j-3k-6(2i+2j+k) and l2 is represented as r2=-2i+2k-1(-j-k) my normal: 1/3 (-i+2j-2k) and the shortest distance is 3 i don't understand what you mean by the normal multiplied by the...

okay i have a normal which is perpendicular to both these lines: 1/3 (-i+2j-2k) and i found out that the shortest distance between my two lines is 3 or something what do i do now? do i leave line 1 in terms of xyz and line 2 in terms of ijk, take l2-l1 and make it =3?

the question asks me to find a point on the first line which is closest to line 2 what is the general procedure for this? do i get l ine2-line1=my shortest distance?

does that mean i get three separate equations each with the three variables... but how do i balance them like you said?...

-3i-j+5k = t (root34/102 (11i-13j+4k))-s(-j-k)+r(2i+2j+k) how do i write this eqn as 3 scalar equations and a system of three linear eqns for the three parameters r,s, and t. PLEASE HELP...

(a) Find the equation of the plane p which passes through the three points (A 1,0,1), B(2,−1,1) .and C(0,3,2) . (b) Find a scalar parametric form of the equation for the line which passes through the point D(−1,1,1) and which is perpendicular to the plane p. (c) Let E be the point where...

A disk and a box of equal mass are released from the top of two inclines both of which are a height h above the ground and make an angle θ to the horizontal. Let the radius of the disk be R. How much sooner does the box reach the bottom of the incline than the disk? Express your answer in terms...

yep... so my solutions are z=2+4i, z=2-4i and z=-2 thankyou!

so my solutions are: z=2+4i and z=2-4i??

umm so i did the double derivative of y=f(x,z) and i found z= 1/3 so is it at this point that the concavity changes? i did try to draw some level curves on the xy plane for z=2 and z=3 i found out that they were both concave down, so i would have z=o level curve concave up and z=1 z=2 z=3...

i reread your explanation and redid it so what i did was sub a+ib and a-ib straight into z^2+4zbar+4=0 and i got a squared -b squared +4 + 4a +2bi(a-2) = o and then a-2=0 a=2 and a squared -b squared +4+4a=0 and i get a=2 and b=+/-4 do i sub these back into z and z bar or something?