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Solve for x: (1 + x + x^2)/(1 - x + x^2) = (62(1 + x))/(63(1 - x)) - Mathematics

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प्रश्न

Solve for x: `(1 + x + x^2)/(1 - x + x^2) = (62(1 + x))/(63(1 - x))`

योग
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उत्तर

It is given that:

`(1 + x + x^2)/(1 - x + x^2) = (62(1 + x))/(63(1 - x))`

⇒ `63(1 - x)(1 + x + x^2) = 62(1 + x)(1 - x + x^2)`

⇒ `63(1 - x^3) = 62(1 + x^3)`

⇒ 63 − 63x3 = 62 + 62x3

⇒ 63 − 62 = 62x3 + 63x3

⇒ 1 = 125x3

⇒ x3 = `1/125`

⇒ x = `root3 (1/125)`

⇒ x = `1/5`

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अध्याय 7: Ratio and proportion - Exercise 7C [पृष्ठ १३९]

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नूतन Mathematics [English] Class 10 ICSE
अध्याय 7 Ratio and proportion
Exercise 7C | Q 18. | पृष्ठ १३९
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