Question

Pick out the solution from the values given in the brackets against each equation:

$$\begin{gathered} k+1=0 \\ (-1,1,2) \end{gathered}$$

Answer 1

The equation, $k+1=0$

When,

$$\begin{gathered} k=-1 \\ LHS:-1+1=0 \\ RHS:0 \\ LHS=RHS \end{gathered}$$

When,

$$\begin{gathered} k=1, \\ LHS:1+1=2 \\ RHS:0 \\ LHS\ne RHS \end{gathered}$$

When ,

$$\begin{gathered} k=2, \\ LHS:2+1=3 \\ RHS:0 \\ LHS\ne RHS \end{gathered}$$

Hence , $k=-1$ satisfies the equation.