What is arithmetic sequence?, Tn= 2a+nd, Tn = a+nd, Tn = a+(n-1)d, Tn = 2a+(n-1)d, What is arithmetic series?, Sn = a+(a+d)+(a+2d)+..., Sn = a/2+(a+d)/2+(a+2d)/2+..., Sn = a+(a+r)+(a+2r)+..., Sn = a/2+(a+r)/2+(a+2r)/2+..., What is geometric sequence?, Tn = a(rn +1), Tn = a(rn - 2), Tn = a(rn + 2), Tn = a(rn - 1), What is geometric series?, Sn = a/2+(ar)/2+(ar2)/2+..., Sn = a+(ar)+(ar2)+..., Sn = a+(ad)+(ad2)+..., Sn = a/2+(ad)/2+(ad2)/2+..., When n is a positive integer:, Validation for the expansion is |b|>1, Validation for the expansion is |b|<1, Validation for the expansion is ℝ, Validation for the expansion is ℝ-, When n is a negative integer:, Validation for the expansion is |b/a|<1, Validation for the expansion is |b/a|>1, Validation for the expansion is|b/a|< ℝ, Validation for the expansion is |b/a|> ℝ, When n is a fraction:, Validation for the expansion is|b/a|< ℝ, Validation for the expansion is |b/a|<1, Validation for the expansion is |b/a|> ℝ, Validation for the expansion is |b/a|>1, Given -6,-4.5,-3,-1.5,... , what is the d?, 1, -1.5, -1, 1.5, Given 4,-12,36,-108,... , what is the r?, 3, 2, -2, -3, 'ar' is refered to..., T∞, T1, T2, T3

☆ Sequence & Series ☆

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