find the value of k for which the equation x^k(k+1)+2x+7=0
mysticd:
check the problem again something wrong
nothing wrong
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consider the power of x as 2. so it is a quadratic equation. then putting 2 in the power of x we get, k(k+1)=2.so k²+(2-1)k-2=0.
or,k=1or -2.
or,k=1or -2.
why we take it as quadratic equation
because an equation can only be a quadratic equation when in the equation the power of x is 2 which can be only possible when the equation is equal to 0
welcome
i think ur solution is wrong
ok then think
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