1.

For some real number k, the value of `lim_(x rarr -k) (x^(5)+k^(5))/(x+k)` can be____.A. 50B. 60C. 70D. 80

Answer» Correct Answer - D
Use the formula, `underset(x rarr a)("lim")(x^(n)-a^(n))/(x-a)=na^(n-1)`


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