I am trying to solve $3x^3\equiv 7\pmod{925}$.
I thought of using brute force, but $925$ is too big for that.
I also tried raising both sides of the equation to the power of $3$, but it didn't help.
How can I solve it?
How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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