CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The sum of a number and its reciprocal is 2120. The number is
(a) 54 or 45
(b) 43 or 34
(c) 56 or 65
(d) 16 or 6


Solution

(a) 54 or 45

Let the required number be x.According to the question: x + 1x = 4120 x2 + 1x = 4120 20x2  41x + 20 = 0 20x2  25x  16x + 20 = 0 5x(4x  5)  4(4x  5) = 0 (4x  5)(5x  4) = 0 x = 54 or x = 45

Mathematics
RS Aggarwal (2018)
Standard X

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
Same exercise questions
View More


similar_icon
People also searched for
View More



footer-image