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 Sep 21 awarded Custodian Sep 13 comment Modulo equation : $\frac{n^{k+1}-1}{n-1} \equiv a{\pmod p}$ Can you tell me, more, please. Sep 13 asked Modulo equation : $\frac{n^{k+1}-1}{n-1} \equiv a{\pmod p}$ Aug 20 accepted Matrix Manipulation : trick to sum elements of vector Aug 20 asked Matrix Manipulation : trick to sum elements of vector Jun 26 accepted Multi variable integral : $\int_0^1 \int_\sqrt{y}^1 \sqrt{x^3+1} \, dx \, dy$ Jun 26 accepted Find volume of region bound by $y=x, y=x^2$ around x-axis Jun 15 asked Find volume of region bound by $y=x, y=x^2$ around x-axis Jun 15 accepted $s(x)$ is a arc length function, find $s'(x)$ Jun 15 accepted $f(1)=-3$ and $f'(x)\geq7$ how small is $f(5)$? Jun 14 reviewed Approve $s(x)$ is a arc length function, find $s'(x)$ Jun 14 revised $s(x)$ is a arc length function, find $s'(x)$ added 4 characters in body Jun 14 asked $s(x)$ is a arc length function, find $s'(x)$ Jun 13 comment $f(1)=-3$ and $f'(x)\geq7$ how small is $f(5)$? And. this problem is call "how small" make me think about min/max rather than think $f(5)$ is a fixed number :D Jun 13 comment $f(1)=-3$ and $f'(x)\geq7$ how small is $f(5)$? ah. put your solution together with Steven Stadnicki comment to prove f(x) is a linear equation, can solve my question :D Jun 13 comment $f(1)=-3$ and $f'(x)\geq7$ how small is $f(5)$? @Serkan is $f(x)$ linear, right ? But can we have this conclusion ? (I think this obvious, but maybe there some other function, that after you derive, it will be constant too) Jun 13 asked $f(1)=-3$ and $f'(x)\geq7$ how small is $f(5)$? Jun 13 comment Multi variable integral : $\int_0^1 \int_\sqrt{y}^1 \sqrt{x^3+1} \, dx \, dy$ @Marvis region over which you are integrating is below the parabola $y=x^2$ from x=0 to 1 Could you explain more, please. Jun 12 accepted Lagrange's method to find min/max question Jun 12 accepted Formula to estimate sum to nearly correct : $\sum_{n=1}^\infty\frac{(-1)^n}{n^3}$