How do you write the product of the expression #5^4*5^-7# using a positive exponent?
2 Answers
Nov 20, 2016
Explanation:
Using the
#color(blue)"laws of exponents"#
#color(orange)"Reminder " color(red)(bar(ul(|color(white)(2/2)color(black)(a^mxxa^n=a^(m+n)" and " a^-mhArr1/a^m)color(white)(2/2)|)))#
#rArr5^4xx5^-7=5^-3=1/5^3#
Nov 20, 2016
Explanation:
Another approach is to get rid of the negative index first..
Recall:
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