Question

b,3mũ10×11+45×3mũ8/16×3mũ9(/là phân số)

a, 12mũ5:(64×3mũ4)

Answer 1

b, = \(\frac{3^9\cdot3\cdot11+15\cdot3\cdot3^8}{16\cdot3^9}\)

= \(\frac{3^9\cdot33+15\cdot3^9}{16\cdot3^9}\)

= \(\frac{3^9\cdot\left(33+15\right)}{3^9\cdot16}\)

=\(\frac{48}{16}=3\)

a, =\(\frac{\left(3\cdot4\right)^5}{4^3\cdot3^4}\)= \(\frac{3^4\cdot3\cdot4^3\cdot4^2}{4^3\cdot3^4}\)=  3 * 4^2 = 3 * 16 = 48

Answer 2

b,    (3¹⁰*11+3⁸*45)/16*3⁹=3^10*11+3^10*5/16*3^9=3^10*16/3^9*16=3

a,   12^5/64*3^4=2^10*3^5/2^6*3^4=2^4*3=48