14/4 is simplified to 7/2 and as a mixed number it would be 3 1/2
X^(1/7)x^(1/7)x^(1/7)x^(1/7)
Well the rule for multiplying similar bases with exponents is:
(a^b)(a^c)(a^d)=a^(b+c+d), so in this case:
x^(1/7+1/7+1/7+1/7)
x^(4/7)
In words that is x raised to the 4/7 th power or the seventh root of x raised to the 4th power.