Show that 9n cannot end with 2 for any natural number n.
Show that 9n cannot end with 2 for any natural number n.
Sanskar Pathak , 9 Years ago
Grade 9
10 grade maths> Show that 9 n cannot end with 2 for any n...
1 Answers
Harsh Patodia
Last Activity: 9 Years ago
9n=32n= (2+1)2n
Using binomial expansion (a+b)n = nC0 an + nC1an-1b1. . . . . + nCn bn
Above will be ending in odd number or you can show by taking some values of n and see the pattern.
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