If x + 1/x = 10, then x^2 = 1/x^2 = _____?
- 98
- 96
- 92
- None of these
Explanation
Given:
x + 1/x = 10
Squaring both sides:
(x + 1/x)^2 = 10^2
x^2 + 2(x)(1/x) + 1/x^2 = 100
x^2 + 2 + 1/x^2 = 100
Subtract 2 from both sides:
x^2 + 1/x^2 = 98
Related MCQs
- 10 and 30
- 15 and 25
- 20 and 20
- 12 and 28
اس سوال کو وضاحت کے ساتھ پڑھیں
- (t² + 4)(t - 2)(t - 2)
- (t² - 4)(t² - 4)
- (t² + 4)(t + 2)(t - 2)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- +4
- -4
- +16
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Leave a Reply
Your email address will not be published. Required fields are marked *
