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| 1. |
for what value of n 2power n into 5 power n ends with 5 |
| Answer» {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 | |