To determine which equations can be rewritten to have common bases on both sides, let's analyze each option:
-
3^x = 4^(x + 1)
- Bases are not the same and cannot be converted to a common base.
- Not applicable.
-
3^x = 9^(2x - 1)
- 9 can be expressed as \(3^2\), thus \(9^{2x - 1} = (3^2)^{2x - 1} = 3^{4x - 2}\).
- This can be rewritten as \(3^x = 3^{4x - 2}\), which gives a common base (3) on both sides.
- Applicable.
-
4^(3x - 1) = 64^x
- 64 can be expressed as \(4^3\), thus \(64^x = (4^3)^x = 4^{3x}\).
- This can be rewritten as \(4^{3x - 1} = 4^{3x}\), which gives a common base (4) on both sides.
- Applicable.
-
2^x = 6
- The left side is base 2 and the right side is base 6. These bases cannot be made common.
- Not applicable.
-
81 = 9^x
- 81 can be expressed as \(9^2\), so this can be rewritten as \(9^2 = 9^x\), which gives a common base (9) on both sides.
- Applicable.
In summary, the equations that can be rewritten to have common bases on both sides are:
- 3^x = 9^(2x - 1) (Applicable)
- 4^(3x - 1) = 64^x (Applicable)
- 81 = 9^x (Applicable)