Given = {x + (1/x)} = 7 On, squaring both sides, we have; {x + (1/x)}2 = 72 Or, x2 + (1/x)2 + 2 = 49 Or, {x2 + (1/x)2} = 47 On subtracting '2' from both sides, we have; {x2 + (1/x)2 - 2} = 45 Or, {x - (1/x)}2 = 45 So, {x - (1/x)} = 3√5 Since, (a2 - b2) = (a + b) X (a - b) {x2 - (1/x)2} = {x - (1/x)} X {x + (1/x)} = 3√5 X 7 = 21√5
Consider the following rivers:
1. Barak
2. Lohit
3. Subansiri
Which of the above flows/flow through Arunachal Pradesh?
Consider the given statements:
(I) The outer-most range of the Himalayas is called the Shiwaliks.
(II) Shiwaliks extend over a width of 10...
‘Redcliff line’ demarcates the boundary between India and which country?
Which of the following statements is NOT correct?
(I) Agra and Darjeeling are located on the same latitude.
(II) Higher mountainous regi...
In a particular region in India, the local people train the roots of living trees into robust bridges across the streams. As the time passes, these brid...
Which of the following states does not share a boundary with Bangladesh?
The Brahmaputra, Irrawady and Mekong rivers originate in Tibet and flow through narrow and parallel mountain ranges in their upper reaches. Of these riv...
Which statement(s) is/are correct regarding the Ganga Plain?
(I) Extends between the Ghaggar and Teesta rivers.
(II) Covers northern India...
Which river of Peninsular India does not flow into the Arabian Sea?
Hygrometer is for
