Advertisements
Advertisements
प्रश्न
If m - n = -2 and m3 - n3 = -26, find mn.
बेरीज
Advertisements
उत्तर
m - n = -2, m3 - n3 = -26
(m - n)3 = m3 - n3 - 3mn (m - n)
⇒ (-2)3 = -26 - 3mn (-2)
⇒ 6mn
= - 8 + 26
= 18
⇒ mn = 3.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand.
`(x + 1/x)^3`
If `a^2 + 1/a^2` = 18; a ≠ 0 find :
(i) `a - 1/a`
(ii) `a^3 - 1/a^3`
Use property to evaluate : 133 + (-8)3 + (-5)3
If a ≠ 0 and `a - 1/a` = 4 ; find : `( a^3 - 1/a^3 )`
If `3x - (1)/(3x) = 9`; find the value of `27x^3 - (1)/(27x^3)`.
If `x + (1)/x = 5`, find the value of `x^2 + (1)/x^2, x^3 + (1)/x^3` and `x^4 + (1)/x^4`.
If `"a" - (1)/"a" = 7`, find `"a"^2 + (1)/"a"^2 , "a"^2 - (1)/"a"^2` and `"a"^3 - (1)/"a"^3`
If `x^2 + (1)/x^2 = 18`; find : `x^3 - (1)/x^3`
Evaluate the following :
(3.29)3 + (6.71)3
Expand (3p + 4q)3
