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4d_
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5 votes
7 answers
6k views

Roots of quadratic equation $ax^2+bx+c$ at infinity [closed]

4 votes
3 answers
1k views

If $f(x) =5x^2 - 2kx + 1 < 0$ has exactly one integral solution, find the sum of all positive integral values of $k$.

4 votes
0 answers
194 views

Summation of series (general term)

4 votes
1 answer
2k views

Sequence vs Progression

3 votes
2 answers
607 views

Extraneous solutions in radical inequalities?

3 votes
3 answers
108 views

$x +\frac 1 x\leq -2$ for $x\leq 0$ How do I prove this statement using algebra?

3 votes
1 answer
90 views

Summation of series (proof) [duplicate]

2 votes
3 answers
482 views

Why does this quadratic expression have three zeroes?

2 votes
2 answers
199 views

Quadratic equations/modulus

2 votes
4 answers
317 views

Maxima & Minima

1 vote
1 answer
1k views

A Rational function with a common factor in numerator and the denominator

1 vote
1 answer
255 views

Miscellaneous series

1 vote
2 answers
82 views

($a^n$+$b^n$) is divisible by ($a$+$b$) when $n$ is odd (proof by induction)

1 vote
3 answers
51 views

Solving for $x$ (a quadratic equation)

0 votes
2 answers
375 views

Location of roots (quadratic Equation). Conditions on $a$

0 votes
1 answer
70 views

Graph of $x^2$ + $y$ $=$ $0$ is an upward or a downward opening parabola?

0 votes
0 answers
55 views

Does a rational function with real coefficients always have rational roots?

0 votes
1 answer
104 views

Is there a geometrical meaning of two quadratic equations (in one variable) having a common root?

0 votes
3 answers
2k views

Can’t we use ‘vector product’ to find the angle between two vectors?

0 votes
4 answers
76 views

Can't seem to understand this proof (Sequence and series)

0 votes
3 answers
104 views

Stuck on this problem based on theory of equations/Quadratic equations

-2 votes
6 answers
131 views

Is ${5^{2}}^{x}$ the same thing as ${25}^{x}$