\(\rm \sqrt {x^2 \ - \ x - 110}\) द्वारा परिभाषित फलन f : R → R का डोमेन क्या है?

  1. (- ∞, - 10] ∪ [11, ∞)
  2. (- ∞, 11] ∪ [- 10, ∞)
  3. (- ∞, 10] ∪ [- 11, ∞)
  4. (- ∞,  10] ∪ [11, ∞)

Answer (Detailed Solution Below)

Option 1 : (- ∞, - 10] ∪ [11, ∞)
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अवधारणा:

एक फलन का डोमेन स्वतंत्र चर के संभावित मानों का पूरा समुच्चय है।

√f(x) का डोमेन ज्ञात करने के लिए f(x) ≥ o सेट करें

गणना:

दिया गया: \(\rm \sqrt {x^2 \ - \ x - 110}\) द्वारा परिभाषित फलन f : R → R

हम जानते हैं कि एक फलन का डोमेन स्वतंत्र चर के संभावित मानों का पूरा समुच्चय है।

डोमेन खोजने के लिए

= x2 - x - 110 ≥ 0

= x2 - 11x + 10x - 110 ≥ 0

= x(x - 11) + 10(x - 11) ≥ 0

= (x + 10)(x - 11) ≥ 0

= x ≤ - 10 या x ≥ 11

= x ∈ (- ∞, - 10] ∪ [11, ∞)

\(\rm \sqrt {x^2 \ - \ x - 110}\) द्वारा परिभाषित फलन f : R → R का डोमेन (- ∞, - 10] ∪ [11, ∞) है

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