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10 questions from this quiz
Sequence with constant difference
1,2,4,8,16,…1, 2, 4, 8, 16, \ldots1,2,4,8,16,…
444
The common difference
an=a+(n−1)da_n = a + (n - 1)dan=a+(n−1)d
191919
a,a+d,a+2d,a+3d,…a, a+d, a+2d, a+3d, \ldotsa,a+d,a+2d,a+3d,…
Sn=n2(2a+(n−1)d)S_n = \frac{n}{2}(2a + (n-1)d)Sn=2n(2a+(n−1)d)
555555
474747
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