Question

doar cele incercuite DAU COROANA​

Answer 1

a)

$(4 ^{x} )^{2} = 2 ^{8} = > x \times 2 = 8 = > x = 4$

c)

$(5 ^{2} ) ^{x + 3 } = 5 ^{4x} = > 2 \times (x + 3) = 4x + 2 \\ 2x + 6 = 4x + 2 \\ 6 = 2x + 2 \\ 4 = 2x \\ 2 = x$

e)

$(3 ^{x} )^{5} = 3 ^{10} \times 3 ^{5 } \\ = > 5 \times x = \times 5 \\ 5x = 50 \\ x = 10$

g)

$x \div (2^{2} \times 3 ^{3} ) = 4 \\ x \div (4 \times 8) = 4 \\ x \div 32 = 4 \\ x = 128$