Highly selective Backlog Qs for JEE MainMathematicsQuadratic Equation

The value of 42+ 42+ 42+ . is equal

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Correct answer

A. 7

Step-by-step solution

Let y= 42+ 42+ 42+ y= 42+y On squaring both sides, we get aligned & y^2=42+y & y^2-y-42=0 & aligned array rlrl & & (y-7)(y+6) & =0 & y =7,-6 array Since, y=-6 is not satisfied the given equation. The required solution is y=7 .

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