không bằng nhau vì:

\(3^6\)=\(\left(3^3\right)^3\)

\(3^6=3^{3.3}\)

\(3^6=3^9\)

bằng nhau vì

\(2^4=16\)

\(2.2.2.2=16\)

16=16

\(\dfrac{3}{7}x+\dfrac{1}{4}=\dfrac{11}{2}\)

\(\dfrac{3}{7}x=\dfrac{11}{2}-\dfrac{1}{4}\)

\(\dfrac{3}{7}x=5\dfrac{1}{4}\)

\(x=5\dfrac{1}{4}:\dfrac{3}{7}\)

\(x=12\dfrac{3}{7}\)

M=2(x-3)-x+4

=2x-6-x+4

=x-2

Ta có: x – y = x.y ⇒ x = x.y + y = y.(x + 1)      (1)

Suy ra: x : y = y.(x + 1) : y = x + 1      (2)

Theo giả thiết, x : y = x – y nên từ (2) suy ra:

⇒ x – y = x + 1 ⇒ y = −1

Thay y = - 1 vào (1) ta được:

x = (-1)(x + 1) ⇒ x = − x – 1 ⇒ 2x = −1 ⇒ x = (-1)/2

Vậy x = −1/2; y = −1.

\(\dfrac{11}{2}.2+x=\dfrac{1}{7}\)

\(11+x=\dfrac{1}{7}\)

\(x=\dfrac{1}{7}-11\)

\(x=-10\dfrac{6}{7}\)

\(2^{x+1}=16\)

\(2^{x+1}=2^4\)

\(\Rightarrow x+1=4\)

\(\Rightarrow x=4-1\)

\(\Rightarrow x=3\)

phenomena

eternal fire

crocodile

zigzag

strong wall

electric eel

=\(\dfrac{125}{4}-\dfrac{25}{4}\)

=\(\dfrac{100}{4}\)=25

Em đăng ký tham gia khảo sát ứng dụng