Sequences and Series
If A1,A2 be two arithmetic means between 31 and 241, then their value are
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Find the sum of the following series to n
Find the sum to n terms of the series 12−22+32−42+52−62+....
If the sum of the squares of the first n
natural numbers exceeds theri sum by 330,
Find the sum to infinity of the series 12+22x+32x2+∞˙
Which term of the sequence 20,1941,1821,1743,˙
is the first negative term?
denotes the sum of the first n
terms of an A.P., then find the common difference.
Find the sum to n
terms of the series 3+15+35+63+