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# If ∆ x = x for x ≥ 0 and 2x for x < 0,

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Re: If x = x for x 0 and 2x for x < 0, [#permalink]
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Given that ∆ x = x for x ≥ 0 and 2x for x < 0 and we need to find the value of $$\frac{∆30}{∆(-5)}$$

∆30 = 30 (because ∆ x = x for x ≥ 0)
∆(-5) = 2*-5 = -10 (because ∆ x = 2x fo)

=> $$\frac{∆30}{∆(-5)}$$ = $$\frac{30}{-10}$$ = -3