Question

metod of finding cube root of a number

Answer 1

1.method of estimaton
e.g 5832
5 ans 832
unit digit =2
unit digit of cube root=8
tens digit=1cube<5<2cube
=18
2.sum of the consective odd numbers

$n(n - 1) + 1$
e.g.8cube
n(n-1)+1
8×7+1
56+1
57
=57+59+61+63+65+67+69+71
=512
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