if one root of the quadratic equation is 7x2 + kx + 7 = 0 is 1/7 then find the value of k
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Here,in the equation-7x^2+kx+2=7,put the value of x as 1/7[as we are given that 1/7 is the root of this equation].
Now,
7(1/7)^2+k(1/7)+7=0
7(1/49)+k/7+7=0
1/7+k/7+7=0
1+k+49=0 [By taking 7 as LCM]
k=-50
=Hence, the required value of k is -50.
{You can also verify your answer by putting the value of k in the given equation.}

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