Let a, b, c, be in A.P. ,with a common difference d, then e1/e , eb/ae, e1/a are in
Sum to 20 terms of the series (1.3)2 + (2.5)2 + (3.7)2 +… is:
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The sum of the series 32 + 62 + 92 + … + (3n)2 is:
In how many different ways the letters of the word HEXAGON can be permuted?
The sum of the squares of the first 15 natural numbers is
Sum of squares of the first n natural numbers is given by:
The sum of the series 13 – 23 + 33 – 43 + ……. + 93 is:
Sum to n terms of the series 2 + 5 + 14 + 41 +… is:
If 1, a and P are in A. P. and 1, g and P are in G. P., then
75 videos|238 docs|91 tests
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75 videos|238 docs|91 tests
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