Find the value of k for which 2y+x=k is a tangent to the curve y*2+4x=20
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using condition if tangency we can solve this..
.we know that any line which is tangent to curve only if when it touches at one point fir this discriminant should be zero.
see attachment...
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hope it will help u
.we know that any line which is tangent to curve only if when it touches at one point fir this discriminant should be zero.
see attachment...
____________________________________
hope it will help u
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