Home
Class 12
MATHS
If a,bgt0 such that a^3+b^3=2 , then sh...

If a,`bgt0` such that ` a^3+b^3=2` , then show that `a+ble 2`.

Text Solution

Verified by Experts

We have
`((a^(3))^(1//3) + (b^(3))^(1//3))/(2) le (a^(3 + b^(3))/(2))^(1//3)`
`implies (a + b)/(2) le 1`
`implies a + b le 2`
Promotional Banner

Topper's Solved these Questions

  • INEQUALITIES INVOLVING MEANS

    CENGAGE|Exercise Exercise 6.1|8 Videos
  • INEQUALITIES INVOLVING MEANS

    CENGAGE|Exercise Exercise 6.2|6 Videos
  • INEQUALITIES INVOLVING MEANS

    CENGAGE|Exercise Comprehension|2 Videos
  • INEQUALITIES AND MODULUS

    CENGAGE|Exercise Single correct Answer|21 Videos
  • INTEGRALS

    CENGAGE|Exercise Solved Examples And Exercises|222 Videos

Similar Questions

Explore conceptually related problems

If a^(3)-3a^(2)+5a-17=0 and b^(3)-3b^(2)+5b+11=0 are such that a+b is a real number, then the value of a+b is

If (x ^(2) -1) is a factor of ax ^(4) + bx ^(3) + cx ^(2) + dx +e, then show that a + c +e =b +d=0

Show that if iz^3+z^2-z+i=0 , then |z|=1

(a) If x + y + z=0, show that x ^(3) + y ^(3) + z ^(3)= 3 xyz. (b) Show that (a-b) ^(3) + (b-c) ^(3) + (c-a)^(3) =3 (a-b) (b-c) (c-a)

Let =|2a_1b_1a_1b_2+a_2b_1a_1b_3+a_3b_1a_1b_2+a_2b_1 2a_2b_2a_2b_3+a_3b_2a_1b_3+a_3b_1a_3b_2+a_2b_3 2a_3b_3| . Expressing as the product of two determinants, show that =0. Hence, show that if a x^2+2h x y+b y^2+2gx+2fy+c=(l x+m y+n)(l^(prime)x+m^(prime)y+n),t h e n|a hgh bfgfc|=0.

If a x^2+b/xgeqc for all positive x where a >0 and b >0, show that 27 a b^2geq4c^3dot

Let z_1, z_2, z_3 be three complex numbers and a ,b ,c be real numbers not all zero, such that a+b+c=0a n da z_1+b z_2+c z_3=0. Show that z_1, z_2,z_3 are collinear.

A point on the hypotenuse of a triangle is at distance a and b from the sides of the triangle. Show that the minimum length of the hypotenuse is (a^((2)/(3))+b^((2)/(3)))^((3)/(2)) .

If a^(2) + b^(2) = 7 ab, show that log ((a + b)/(3)) = (1)/(2) (log a + log b ).

Let a=(pi)/(7) , then (a) show that sin^(2)3a-sin^(2)a=sin2asin3a (b) show that co sec a=co sec 2a+co sec4a . (c) Prove that cos a is a root of the equation 8x^(3)+4x^(2)-4x+1=0 .

CENGAGE-INEQUALITIES INVOLVING MEANS -Examples
  1. Prove that (sec^4alpha)/(tan^2beta)+(sec^4beta)/(tan^2alpha)ge8. If ea...

    Text Solution

    |

  2. Prove that [(x^2+y^2+z^2)/(x+y+z)]^(x+y+z)gtx^xy^yz^zgt[(x+y+z)/(3)]...

    Text Solution

    |

  3. Prove that 1^(2)+2^(2)+3^(2)+.....+n^(2)=(n(n+1)(2n+1))/6

    Text Solution

    |

  4. Find the greatest value of x^2y^3, w h e r exa n dy lie in the first q...

    Text Solution

    |

  5. Find the maximum value of (7-x)^4(2+x)^5w h e nx lies between -2a n d7...

    Text Solution

    |

  6. Find the maximum value of xyz when (x)/(1)+(y^2)/(4)+(z^3)/(27)=1, whe...

    Text Solution

    |

  7. If a,bgt0 such that a^3+b^3=2 , then show that a+ble 2.

    Text Solution

    |

  8. If m >1,n in N show that 1m+2m+2^(2m)+2^(3m)++2^(n m-m)> n^(i-m)(2^n-...

    Text Solution

    |

  9. Prove that n in acute angled triangle ABC , sec A+sec B +sec Cge 6.

    Text Solution

    |

  10. Prove that (b^2+c^2)/(b+c)+(c^2+a^2)/(c+a)+(a^2+b^2)/(a+b)gt a+b+c , w...

    Text Solution

    |

  11. Prove that (a^8+b^8+c^8)/(a^3b^3c^3)>1/a+1/b+1/c

    Text Solution

    |

  12. If a ,b ,a n dc are positive and a+b+c=6, show that (a+1//b)2+(b+1//c)...

    Text Solution

    |

  13. Let x1, x2, ,xn be positive real numbers and we define S=x1+x2++xndot...

    Text Solution

    |

  14. If 2x^3 +ax^2+ bx+ 4=0 (a and b are positive real numbers) has 3 real ...

    Text Solution

    |

  15. Calculate the greatest and least values of the function f(x)=(x^4)/(x...

    Text Solution

    |

  16. If a,b,c are three distinct positive real numbers in G.P., than prove ...

    Text Solution

    |

  17. If x and y are real numbers such that 16^(x^(2)+y)+16^(x+y^2)=1, then ...

    Text Solution

    |

  18. In how many parts an integer N>=5 should be dissected so that the pro...

    Text Solution

    |

  19. If x+y+z=1a n dx ,y ,z are positive, then show that (x+1/x)^2+(y+1/y)^...

    Text Solution

    |

  20. If a, b,c are three positive real numbers , then find minimum value of...

    Text Solution

    |