Question

pls help me solve this question by finding value of x​

Answer 1

Answer:

x is -2

Step-by-step explanation:

(2/5)⁴ x (2/5)⁻⁷ = (2/5)²ˣ⁺¹

(2/5)⁴⁻⁷ = (2/5)²ˣ⁺¹

(2/5)⁻³ = (2/5)²ˣ⁺¹

If bases are equal then there powers will be equal. So,

2x + 1 = -3

2x = -3 - 1

2x = -4

x = -4/2

x = -2

Answer 2

Step-by-step explanation:

${( \frac{2}{4} )}^{4} \times { (\frac{2}{5}) }^{ - 7} = { (\frac{2}{5} )}^{2x + 1} \\ \\ on \: comparing \: both \: side \\ \\ 4 - 7 = 2x + 1 \\ - 3 = 2x + 1 \\ 2x = - 4 \\ x = - 2$