how -1+15 =14. give explain
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Explanation:
The pattern is + 4, + 9, + 16, + 25, + 36, ..... i.e. + 2
2
,+3
2
,+4
2
,+5
2
,+6
2
,.....
So, missing term = 91+7
2
=91+49=140.
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