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Find-the-gineral-form-of-the-sequence-2-2-2-2-




Question Number 103177 by mohammad17 last updated on 13/Jul/20
Find the gineral form of the sequence ⟨2,−2,2,−2,.....⟩?
$${Find}\:{the}\:{gineral}\:{form}\:{of}\:{the}\:{sequence}\:\langle\mathrm{2},−\mathrm{2},\mathrm{2},−\mathrm{2},…..\rangle? \\ $$
Answered by Dwaipayan Shikari last updated on 13/Jul/20
2Σ_(n=1) ^∞ (−1)^(n+1)
$$\mathrm{2}\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\left(−\mathrm{1}\right)^{{n}+\mathrm{1}} \\ $$
Commented by mohammad17 last updated on 13/Jul/20
thank you sir
$${thank}\:{you}\:{sir} \\ $$

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