Calculus
∑m=1∞(12)m \(\displaystyle\)\(\sum\)_{m=1}^{\(\infty\)}\(\left\)(\(\frac\)12\(\right\))^{m}
∑m=1∞(13)m{\(\displaystyle\)\(\sum\)_{m=1}^{\(\infty\)}\(\left\)(\(\frac\)13\(\right\))^{m}}
∑m=1∞(32)m{\(\displaystyle\)\(\sum\)_{m=1}^{\(\infty\)}\(\left\)(\(\frac\)32\(\right\))^{m}}
∑m=1∞(23)m{\(\displaystyle\)\(\sum\)_{m=1}^{\(\infty\)}\(\left\)(\(\frac\)23\(\right\))^{m}}