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Question Number 152435 by fotosy2k last updated on 28/Aug/21

Commented by fotosy2k last updated on 28/Aug/21

$$plshelp$$

Answered by qaz last updated on 28/Aug/21

$$\underset{\mathrm{n}=1}{\sum ^{\mathrm{\infty }}}(\frac{1}{3^{\mathrm{n}}}-\frac{1}{5^{\mathrm{n}}})=\frac{\frac{1}{3}}{1-\frac{1}{3}}-\frac{\frac{1}{5}}{1-\frac{1}{5}}=\frac{1}{4}$$

Commented by fotosy2k last updated on 30/Aug/21

$$thankyou$$

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