Advertisements
Advertisements
प्रश्न
If `"a"^2+ 1/"a"^2=23`, find : `"a" +1/"a"`
बेरीज
उत्तर
`("a"+1/"a")^2="a"^2+1/"a"^2+2`
`⇒("a"+1/"a")^2=23+2`
`⇒("a"+1/"a")^2=25`
`⇒"a"+1/"a"=sqrt25`
`⇒"a"+1/"a"=±5`
shaalaa.com
Application of Formulae
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
If a2 + b2= 10 and ab = 3; find : a – b
If a2 + b2= 10 and ab = 3; find : a + b
Find: a2 + b2 + c2, if a + b + c = 9 and ab + bc + ca = 24
If a + b = 6 and ab=8, find : a3 + b3.
If `2"x"-1/(2"x")=4`, find : `4"x"^2+1/(4"x"^2)`
If `3"x"+1/(3"x")=3`, find : `9"x"^2+1/(9"x"^2)`
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.
If a + b = 8 and ab = 15, find : a3 + b3.
The difference between the two numbers is 5 and their products are 14. Find the difference between their cubes.
