Advertisements
Advertisements
प्रश्न
If `"a"^2+ 1/"a"^2=23`, find : `"a" +1/"a"`
बेरीज
Advertisements
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 a+b=5 and ab = 6, find a2 + b2
If a2 + b2 = 29 and ab = 10, find : a + b
If a2 + b2= 10 and ab = 3; find : a – b
If a2 + b2= 10 and ab = 3; find : a + b
If `"a" - 1/"a"=4`, find : `"a"^2+1/"a"^2`
If a + b + c = 10 and a2 + b2 + c2 = 38, find : ab + bc + ca
If `3"x"+1/(3"x")=3`, find : `27"x"^3+1/(27"x"^3)`
If a + b + c = 9 and ab + bc + ca = 15, find: a2 + b2 + c2.
If a + b = 8 and ab = 15, find a3 + b3.
If 5x – 4y = 7 and xy = 8, find : 125x3 – 64y3.
