If the function f is given by f(x)=2x2−4, then which of the following represents the value of c such that f(c)=28? Select one: A
1 answer:
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First term (a1) is -1
recursive formula goes like this
is the nth term
is the term before that
we normally have
we see each term is multipying by -3 to get next one
so that would be
where a1=-1
the 3rd option is correct except that it is the explicit formula
so answer is 2nd one
recursive formula goes like this
we normally have
we see each term is multipying by -3 to get next one
so that would be
the 3rd option is correct except that it is the explicit formula
so answer is 2nd one
<span>The <u>correct answer</u> is:
x=4.
Explanation<span>:
The slope of line AB is given by the formula
</span></span>
<span><span>
</span></span><span><span>
Using the coordinates of A and B, we have
</span></span>
<span><span>
Perpendicular lines have slopes that are negative reciprocals. Since the slope of AB is 0/7, the reciprocal is 7/0, which is undefined.
Any line with an undefined slope is a vertical line. This will be a vertical line that passes through point B.
Vertical lines have the equation x=c, where c is a constant; since it runs through B, which has coordinates (4, 4), this means the equation is x=4.</span></span>
x=4.
Explanation<span>:
The slope of line AB is given by the formula
</span></span>
</span></span><span><span>
Using the coordinates of A and B, we have
</span></span>
Perpendicular lines have slopes that are negative reciprocals. Since the slope of AB is 0/7, the reciprocal is 7/0, which is undefined.
Any line with an undefined slope is a vertical line. This will be a vertical line that passes through point B.
Vertical lines have the equation x=c, where c is a constant; since it runs through B, which has coordinates (4, 4), this means the equation is x=4.</span></span>