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for what value of n 2power n into 5 power n ends with 5

Posted by Nit Nit 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 10 months ago

{tex}\begin{array}{l}2^n\times5^n=10^n\\If\;n=0\;then\;10^n=1\\If\;n>0\;then\;10^n\;ends\;with\;0\\If\;n<0\;then\;10^n\;1s\;in\;form\;0.1,\;0.01--\\\end{array}{/tex}

Hence for any value of n 2^n x 5^n can not end with 5

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CBSE > Class 10 > Mathematics