Recent content by moham_87

thnxxxx a lot Muzza for ur help wish u good luck good bye

hi this problem requires calculus, as it also concerns Vector spaces, i solved a lot of Vector spaces problems, either the subset is matrix or ordered pairs. this question says: Which of the following subsets of the vector space C(-inf, inf) are subspaces: (note: C(-infinity, infinity)...

and what about if... What about if "x" is not equal in both equations??

What is that segma?

Hiiiiiiiiiii everyone I've these two waves y1=3sin(kx-wt) y2=4cos(kx+wt) I need to find the resultant wave (y1+y2) I got that answer: y= 7 cos(wt+45) sin(kx+45) is that right?? please if not give me a hint ==================My efforts============================= I added the...

here is my EFFORTS I added the amplidtude mathematically then using trigonometric rules i added the two "sin" and "cos" functions sin(a)+sin(b)=sin((a-b)/2)cos((a+b)/2)...or something like that BYE BYE...i still need to know if my answer is true bYYyYyyyYYyYYyYE

could anyone check that for me please Hiiiiiiiiiii everyone I've these two waves y1=3sin(kx-wt) y2=4cos(kx+wt) I need to find the resultant wave (y1+y2) I got that answer: y= 7 cos(wt+45) sin(kx+45) is that right...

------------------------------------------------------------------ inclined frictionless surface, end of string attached to polly (polly at top of the incline), and other end attached to a mass(m) and mass is attahed to one end of a spring, and the other end is attached to incline base...

i really need to know... first-> integration of: x/(x^4 + 2x^2 + 1) i tried solving that using (ln), u=g(x), and a lot of ways, but i couldn't get an answer second-> ----------------------------------------------------------------- Is the following argument valid? Explain f(x) = 1...

i wish i could find a solution for that poblem it is about inverse function: Show that the function has an inverse function, and find [(d/dx)f^-1(x))] x=a for the given number a f(x)=e^3x + 2e^x - 5 , x>=0 , a=-2 Here i proved that the function has an inverse by finding...

again, I've another question i wish it is the last. it is about "Mean Value Theorem", * if u and v are any real numbers, then, prove that: |sin(u)-sin(v)|<=|u-v| * Prove that [(1+h)^(1/2)] < [1+(h/2)], for h>0 * Suppose that f'(x)=g'(x)+x for every (x) in some interval (I)...

hi, I'm sorry I'm asking alot, but that time i need help here the question says: * Verify the inequality without evaluating the definite integrals: (integration [x^2] from 0 to 1) >= (integration [x^3] from 0 to 1) i can't solve that question without evaluating the integral so how can...

hi that is my first time, and i have questions for my exam. * Show that if a function "f" is continuous and has no zeros on an interval, then either f(x)>0 or f(x)<0 for every "x" in the interval (Intermediate Value Theorem) I solved it in that way: since no zeros in the interval then...