1yes they are correct but what abt the last one.....ok even that seems correct ..
not much probs here...
given a quadratic equation f(x)=ax2+bx+c
what are the conditions for
1}both roots to be greater than a specified number k
2}given number k lies between both the roots
3}both roots are confined within numbers p and q
it would be very good if u r able to explain graphically. this does not mean non grpahical solutions are not allowed{hehehe}
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11 Answers
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21part 3)
the fol. are two conditions.....
1. f(p) * f(q) > 0
2. f'(p) * f'(q) < 0
one more :
let x1 be such that f'(x1) = 0;
then f(p) * f(x1) < 0
obviously (b2 - 4ac > 0 )
these 3 inequations shall defiitley clinch it!!! [1]
