Advertisements
Advertisements
प्रश्न
If `"a"^2+ 1/"a"^2=11`, find : `"a" -1/"a"`
बेरीज
उत्तर
`("a"-1/"a")^2="a"^2+1/"a"^2-2`
`⇒("a"-1/"a")^2=11-2`
`⇒("a"-1/"a")^2=9`
`⇒"a"-1/"a"=sqrt9`
`⇒"a"-1/"a"=±3`
shaalaa.com
Application of Formulae
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
If a+b=5 and ab = 6, find a2 + b2
If a2 + b2= 10 and ab = 3; find : a – b
If `"a" + 1/"a"=3`, find `"a"^2+1/"a"^2`
If `"a"^2+ 1/"a"^2=23`, find : `"a" +1/"a"`
Find : `"a"^3+1/"a"^3`, if `"a" +1/"a"=5`.
If `3"x"+1/(3"x")=3`, find : `9"x"^2+1/(9"x"^2)`
If a2 + b2 = 41 and ab = 4, find : a – b
If a + b + c = 9 and ab + bc + ca = 15, find: a2 + b2 + c2.
If a + b + c = 11 and a2 + b2 + c2 = 81, find : ab + bc + ca.
The difference between the two numbers is 5 and their products are 14. Find the difference between their cubes.
