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Q1.--- Show that no triangular number can be of the form --- 3n-1.

Q2 -- if x is prime to p and p is a prime no. then show that X^{p^r - p^r-1} is divisible by p^r.

why do magnetic field lines make loop while electric field line do not make loop all times

how can u draw the graph of y=x^4+x^3+x^2+x+1

Q:1 explian why gauss law is valid for continuous charge distribiution while it is invalid for discrete charge system.

x= no. of boys in class & y=no. of girls then find total no. of students if xy=2x-y

how many no.s can be formed from all 2,2,2,2 using all 2s at a time.

it is very simple

since , mod(x) and x-1 both ar continious thus the mod of sum of these cont. functions are naturally the cont. funtions.

i.e, mod(x-1 - mod(x)) will be cont. funtion.

Every theory is correct for that period only. So as far as know time is a scalar quatity since it is unidirectional.
Now theidea about time travel is absolutely possible.
Einstein had said that universe can be streached and compressed
so it means we can change our dimentions and thus traves in past and future.
Now i can tell u that as per einstein equation i.e M=m/(1-v^2/c^2)^1/2 this funtion is undefined but as we cross the speed of light the we enters in the complex world that means we have changed our direction and thus u have time travelled. i can make these things clear but it will b mor good for u if u go to www.stringtheory.com . because there the animations will make it more easy for u to understand.

can two like charges attract each other?if yes then explain how

can two like charges attract each other?if yes then explain how

I have scored 91% marks in science.

how can u prove graphically that modulus function is continious but non-differentiable?