# 138 - Mathematics Questions Answers

Solve in integers the equation${x}^{2}+{y}^{2}+xy={(\frac{x+y}{3}+1)}^{3}$

**Asked By: RATHER NOT SAY**

is this question helpfull: 0 0

**submit your answer**There are 8 distinct boxes and each box can hold any number of balls. A child having 4 identical balls randomly choose four boxes. Then another child having four balls, identical to the previous mentioned, again puts one ball in each of the arbitrary chosen four boxes. The probability that there are balls in at least 6 boxes is

Sir pls solve

**Asked By: KANDUKURI ASHISH**

is this question helpfull: 1 0

**submit your answer****Joshi sir comment**

Between two numbers, whose sum is 13/6, an even number of arithmetic means are inserted, the sum of these means exceed their number by unity. How many means are there?

**Asked By: PREM**

is this question helpfull: 2 0

**submit your answer****Joshi sir comment**

$If\frac{9}{a}+\frac{24}{b}=1,a,b,\in {\mathrm{\mathbb{R}}}^{+},provethat{a}^{2}+{b}^{2}\ge 9{(4+\sqrt[3]{9})}^{3}.$

**Asked By: JAMES GHOSH**

is this question helpfull: 3 0

**read solutions ( 1 ) | submit your answer****Joshi sir comment**

The expression ax2
+ 2bx + b has same sign as
that of b for every real x, then the roots of equation
bx2
+ (b – c) x + b – c – a = 0 are
(A) real and equal (B) real and unequal
(C) imaginary (D) None of these

**Asked By: PREM**

is this question helpfull: 1 0

**submit your answer****Joshi sir comment**