### Home > MC2 > Chapter 10 > Lesson 10.2.4 > Problem10-122

10-122.

Since the 3x is in parentheses, the 4 in the exponent applies to both the 3 and the x.

81x4x3

81x(4 + 3)

81x7

(2(4 − 3)) · (3(1 − 2))

21(3−1)

$\frac{2}{3}$

See (a) and (b).