Advertisements
Advertisements
प्रश्न
If `2"x"-1/(2"x")=4`, find: `8"x"^3-1/(8"x"^3)`
बेरीज
Advertisements
उत्तर
`2"x"-1/"2x"=4`
`⇒(2"x"-1/"2x")^3=(4)^3`
`⇒(2"x")^3-(1/"2x")^3-3xx2"x"xx1/"2x"(2"x"-1/"2x")=64`
`⇒8"x"^3-1/"8x"^3-3(4)=64`
`⇒8"x"^3-1/"8x"^3-12=64`
`⇒8"x"^3-1/"8x"^3=64+12`
`⇒8"x"^3-1/"8x"^3=76`
shaalaa.com
Application of Formulae
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
If a2 + b2 = 29 and ab = 10, find : a − b
If a2 + b2= 10 and ab = 3; find : a + b
If `"a"^2+ 1/"a"^2=23`, find : `"a" +1/"a"`
Find: a2 + b2 + c2, if a + b + c = 9 and ab + bc + ca = 24
Find : `"a"^3+1/"a"^3`, if `"a" +1/"a"=5`.
Find:
`a^3-1/a^3`, if `a -1/a = 4`.
If `2"x"-1/(2"x")=4`, find : `4"x"^2+1/(4"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.
