Answer:
Explanation:
Simplify the following:
(sqrt(48))/(sqrt(42))
Rationalize the denominator. (sqrt(48))/(sqrt(42)) = (sqrt(48))/(sqrt(42))×(42^(1 - 1/2))/(42^(1 - 1/2)) = (sqrt(48)×42^(1 - 1/2))/42:
(sqrt(48)×42^(1 - 1/2))/42
Combine powers. (sqrt(48)×42^(1 - 1/2))/42 = sqrt(48)×42^((1 - 1/2) - 1):
sqrt(48)×42^((1 - 1/2) - 1)
Put 1 - 1/2 over the common denominator 2. 1 - 1/2 = 2/2 - 1/2:
sqrt(48)×42^((2/2 - 1/2) - 1)
2/2 - 1/2 = (2 - 1)/2:
sqrt(48)×42^(((2 - 1)/2) - 1)
2 - 1 = 1:
sqrt(48)×42^(1/2 - 1)
Put 1/2 - 1 over the common denominator 2. 1/2 - 1 = 1/2 - 2/2:
sqrt(48)×42^(1/2 - 2/2)
1/2 - 2/2 = (1 - 2)/2:
sqrt(48)×42^((1 - 2)/2)
1 - 2 = -1:
sqrt(48)×42^((-1)/2)
sqrt(48) = sqrt(2^4×3) = 2^2 sqrt(3):
2^2 sqrt(3) 1/sqrt(42)
2^2 = 4:
4 sqrt(3) 1/sqrt(42)
Rationalize the denominator. (4 sqrt(3))/(sqrt(42)) = (4 sqrt(3))/(sqrt(42))×(sqrt(42))/(sqrt(42)) = (4 sqrt(3) sqrt(42))/42:
(4 sqrt(3) sqrt(42))/42
The gcd of 4 and 42 is 2, so (4 sqrt(3) sqrt(42))/42 = ((2×2) sqrt(3) sqrt(42))/(2×21) = 2/2×(2 sqrt(3) sqrt(42))/21 = (2 sqrt(3) sqrt(42))/21:
(2 sqrt(3) sqrt(42))/21
sqrt(3) sqrt(42) = sqrt(3×42):
2/21 sqrt(3×42)
3×42 = 126:
(2 sqrt(126))/21
sqrt(126) = sqrt(3^2×14) = 3 sqrt(14):
2/21 3 sqrt(14)
3/21 = 3/(3×7) = 1/7:
Answer: (2 sqrt(14))/7