



Nếu a/b = c/d, có thể suy ra rằng e^(a/b) = e^(c/d) không?
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a/b=c/d
- Nếu a/b = c/d, so sánh arcsin(a)/arcsin(b) với arcsin(c)/arcsin(d).
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- Giải phương trình (x+1)/2 = (y-1)/3 = (z+2)/4 và x+y+z = 13.
- Nếu x/2 = y/3 = z/5 và 2x + y - z = -8, tìm x, y, z.
- Nếu a/b = c/d, so sánh (a^3 + b^3) / (c^3 + d^3) với (a+b)/(c+d).
- Nếu a/b = c/d, có thể suy ra rằng a^2 + b^2 + ab = c^2 + d^2 + cd không? Cho ví dụ.
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- Tỷ lệ dân số giữa thành thị và nông thôn của một quốc gia là 3 2. Nếu dân số thành thị là 60 triệu người, dân số nông thôn là bao nhiêu?
- Nếu a/b = c/d, có thể suy ra rằng (a+k)/b = (c+k)/d không? Cho ví dụ.
- Nếu a/b = c/d, so sánh (a+b)/(c-d) với (a-b)/(c+d).
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