Q.1The maximum value of the expression(x^2+14x+9)/(X^2+2x+3) for real values of x is
a)2
b)3
c)4
d)5
Q.2)A real number x satisfying 1-(1/n)<x<=(3+1/n) for every positive integer n is
best described by
a)1<x<4
b)0<<=x<=4
c)0<x<=4
d)1<=x<=3
Q.3)if both a and b belong to the set{1,2,3,4},then the no of equation of the form
ax^2+bx+1 having real roots is
a)10
b)7
c)6
d)12
q.4)if x,y,z are positive integers and (x-10)(y-5)(z-2)=1000,what is leas value of (x+y+z)?
a)27
b)28
c)47
d)30
please post solutions so that others can benefit.
Q.1The maximum value of the expression(x^2+14x+9)/(X^2+2x+3) for real values of x is
a)2
b)3
c)4
d)5
Ans. 5
Q.2)A real number x satisfying 1-(1/n)<x<=(3+1/n) for every positive integer n is
best described by
a)1<x<4
b)0<<=x<=4
c)0<x<=4
d)1<=x<=3
Ans. 0<x<=4
@ Amittakshay
Q.3)if both a and b belong to the set{1,2,3,4},then the no of equation of the form
ax^2+bx+c having real roots is
a)10
b)7
c)6
d)12
can u difine about c.
q.4)if x,y,z are positive integers and (x-10)(y-5)(z-2)=1000,what is leas value of (x+y+z)?
a)27
b)28
c)47
d)30
Ans. 47
hi HUMRAZ,
NICE EFFORT
plaese post the solutions
hi humraz,
answer is 4 for frst question ,max value=4
(x-10)(y-5)(z-2)=1000
for min value
x-10= 10
y-5 = 10
z-2 = 10
=> x + y + z = 20 + 15 + 12 = 47
b^2 - 4ac >= 0
b = 1, a = no value
b = 2, a = 1
b = 3, a = 1, 2
b = 4, a = 1, 2, 3, 4
possible number of equations
b^2 - 4ac >= 0
b = 1, a = no value
b = 2, a = 1
b = 3, a = 1, 2
b = 4, a = 1, 2, 3, 4
possible number of equations
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