If  ` 4x-3y+k=0`  touches the ellipse  ` 5x^(2)+9y^(2)=45` , then k is equal to
Channel: Doubtnut
Date: 17/05/2020

PleIf  ` 4x-3y+k=0`  touches the ellipse  ` 5x^(2)+9y^(2)=45` , then k is equal to