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If x4 + \(\frac{1}{x^4}\) = 1154 (x > 0) Find 2(x - 3)2 + 30 |
16 12 46 48 |
46 |
If x4 + \(\frac{1}{x^4}\) = 1154 then, x + \(\frac{1}{x}\) = 6 (remember) ⇒ x2 - 6x = -1 Now; we need to find 2(x - 3)2 + 30 So, 2(x2 + 9 - 6x) + 30 2 (- 1 + 9) + 30 = 46 |
