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Find value of a for which …

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Find value of a for which curve y=x2(square) +ax+25 touches x-axis

Posted by Sweety Yadav 7 years, 11 months ago

CBSE > Class 12 > Mathematics

11 answers

Mohit Lunkad 7 years, 11 months ago

???

Mohit Lunkad 7 years, 11 months ago

So have I told that dy/dx=0 is necessary.

Sweety Yadav 7 years, 11 months ago

According to me if y=0 then it doesn't mean that dy/dx=0

Mohit Lunkad 7 years, 11 months ago

Sorry i forgot, but a=-10 is also possible.

Mohit Lunkad 7 years, 11 months ago

No not at all. I just want yo say that when it will touch x axis at that point y will become zero.

Sweety Yadav 7 years, 11 months ago

U wants to say that dy/dx=0.but how can this possible

Mohit Lunkad 7 years, 11 months ago

As when it touches x axis y=0 x2+ax+25=0 It is only possible when a=10

Mohit Lunkad 7 years, 11 months ago

a=10

Sweety Yadav 7 years, 11 months ago

Then help me to solve it

Sharma Saabh 7 years, 11 months ago

Yes ...i m.

Sweety Yadav 7 years, 11 months ago

Is anyone here

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