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Find the 6th term in this sequence: -7, 2, 19, 44, _, _.


The answer is 118.

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2 solutions

The differences of the progression is in A.P i.e. +9, +17, +25 with difference of +8. Thus,5th and 6th term in the difference sequence are 33, 41. Thus, 44+33+41 = 118

Guiseppi Butel
Apr 19, 2014

By finding the first differences and the second differences the function can be determined to be f(n)=4n^2 -3n -8. Substituting 6 for n we get 118

Good sum

TIRTHANKAR GHOSH - 7 years, 1 month ago

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