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Jan
24
comment Find Coefficients from already fourier function
See math.stackexchange.com/questions/897987/…
Jan
24
comment Find all solutions of the linear congruence $3x-7y \equiv 11$ (mod $13$)
$y\equiv0,1,\cdots,11,12\pmod{13}$ and we can a unique $x\pmod{13}$
Jan
24
comment Find all solutions of the linear congruence $3x-7y \equiv 11$ (mod $13$)
$$3x\equiv11+7y\pmod{13}\equiv-6y+24$$ As $(3,13)=1$ $$\iff x\equiv8-2y\pmod{13}$$
Jan
24
answered Solve diophantine using modulus
Jan
24
revised Help with Conic: Hyperbola's chord of contact
added 197 characters in body
Jan
24
answered Help with Conic: Hyperbola's chord of contact
Jan
24
comment Divisibility of binomial coefficients
See also : math.stackexchange.com/questions/936479/…
Jan
24
revised Divisibility of binomial coefficients
added 1 character in body
Jan
24
answered Divisibility of binomial coefficients
Jan
24
comment Example on Complex Number using De moivrs theorem
I think, the two $1$s should be $i$s. Use en.wikipedia.org/wiki/De_Moivre's_formula
Jan
24
answered How to solve: Differentiate d/dx 7^-1/2
Jan
24
answered Proof by induction, binomial coefficient
Jan
24
comment Why it's true? $\arcsin(x) +\arccos(x) = \frac{\pi}{2}$
@Dor, A generalized version is available here : math.stackexchange.com/questions/672575/…
Jan
24
answered Solve trigonometric equation $\sin(2t) = −\frac{\sqrt{2}}{2}$ on interval $[0, 2 \pi]$
Jan
23
comment Derivative of $x-\sqrt { x } $
@Cherry_Developer, Exactly
Jan
23
answered Derivative of $x-\sqrt { x } $
Jan
23
comment We write all the positive integers run together as follows: $123456789101112131415 . . .$
@JorleArbake, If the required number is $x,$ we have $x-100+1$ of them having three digits each
Jan
23
comment We write all the positive integers run together as follows: $123456789101112131415 . . .$
@JorleArbake, As the first $99$ natural numbers have at most two digits
Jan
23
comment We write all the positive integers run together as follows: $123456789101112131415 . . .$
@JorleArbake, No, numbers between $1$ & $99$ inclusive
Jan
23
comment We write all the positive integers run together as follows: $123456789101112131415 . . .$
Let us continue this discussion in chat.