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Mathematics for IGCSE & O level - Proportion (Section 1 - No. 22)

If *y* varies inversely as *x*2, which of the following is the correct equation?
y = kx2
y = k/x
y = k/x2
x = ky2

Giải thích

If y is inversely proportional to x^2, y = k/x^2.

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