Answer:
1/ 6^12
Step-by-step explanation:
f[x} = x ^ (-2x)
f(6) = 6 ^ (-2*6)
= 6 ^ -12
We know the negative exponent moves it to the denominator
= 1/ 6^12
5 4/7
2 1/7 + 3 3/7
15/7 + 24/7
39/7
45
15 x 3 is 45
