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Find 'n' Such that 7²n-¹=343 |
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Answer» = ((7 ) n+1 ) 3
7 2n+3 (7 2 ) n−2
= (7 3n+3 ) 3 2
7 2n+3 7 2n−4
= 7 2n+2
7 2n+3+2n−4
= 7 2n+2
7 4n−1
=7 4n−1−2n−2
=7 2n−3 |
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