Q. Let h(x)=x+7x2−49 when x=−7.h is continuous for all real numbers.Find h(−7).Choose 1 answer:(A) −14(B) 7(C) 14(D) −7
Definition of h(x): The function h(x) is defined as h(x)=x+7x2−49 for x=−7. To find h(−7), we need to evaluate the limit of h(x) as x approaches −7, since the function is continuous for all real numbers.
Factoring the numerator: First, we factor the numerator of h(x): x2−49 can be factored as (x+7)(x−7).
Rewriting h(x) using factored form: Now, we rewrite h(x) using the factored form: h(x)=x+7(x+7)(x−7).
Canceling out common terms: We notice that (x+7) appears in both the numerator and the denominator. Since we are looking for the limit as x approaches −7, and x is not exactly −7, we can simplify the expression by canceling out the (x+7) terms.
Simplified expression for h(x): After canceling, we get h(x)=x−7 for all x=−7.
Substituting x with −7: Now, we can find h(−7) by substituting x with −7: h(−7)=−7−7.
Calculating h(−7): Calculating the value, we get h(−7)=−14.