=>3M=3+32+33+...+326
=>3M-M=(3+32+33+....+326)-(1+3+32+....+325)
=>2M=326-1
=>M=(326-1)/2
\(3M=3+3^2+3^3+...+3^{26}\)
\(M=1+3+3^2+3^3+...+3^{25}\)
\(\Rightarrow2M=3^{26}-1\)
\(M=\frac{3^{26}-1}{2}\)
=>3M=3+32+33+...+326
=>3M-M=(3+32+33+....+326)-(1+3+32+....+325)
=>2M=326-1
\(\Rightarrow M=\frac{3^{26}-1}{2}\)
M = 1 + 31 + 32 + 33 + ... + 325
=> 3M = 3 + 32 + 33 + 34 + ... + 326
=> 3M - M = ( 3 + 32 + 33 + 34 + ... + 326 ) - ( 1 + 31 + 32 + 33 + ... + 325 )
=> 2M = 326 - 1
=> M = ( 326 - 1 )/2
