If the graph of a quadratic polynomial lies entirely above x-axis, then which one of the following is correct ?
Both the roots are real
One root is real and the other is complex
Both the roots are complex
Cannot say
B.
The sum of the roots of the equation x2 + bx + c = 0 (where b and c are non-zero) is equal to the sum of the reciprocals of their squares. Then are in
AP
GP
HP
None of the above
The sum of the roots of the equation ax2 + x + c = 0 (where a and c are non-zero) is equal to the sum of the reciprocals of their squares. Then a, ca2, c2 are in
AP
GP
HP
None of the above
The number of different words (eight-letter words) ending and beginning with a consonant which can bemade out of the letters of the word 'EQUATlON' is
5200
4320
3000
2160