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Mathematics 13 Online
OpenStudy (anonymous):

The function f(x)= -a^x +4 will never cross the x-axis. True or false??

OpenStudy (anonymous):

OpenStudy (anonymous):

I think its true

OpenStudy (anonymous):

um i agree with @NaomiBell1997

OpenStudy (solomonzelman):

I think it is true, also, it will approach it closely, but never cross

OpenStudy (anonymous):

can someone help me with my question

OpenStudy (solomonzelman):

I think I just did.

OpenStudy (jdoe0001):

ali1029 do you know how \(\bf y= x^2\) looks like?

OpenStudy (ranga):

If a > 1, the function can cross the x axis. y = -a^x +4 To find where it crosses or touches the x axis, set y = 0 and solve for x 0 = -a^x + 4 add a^x to both sides a^x = 4 take log on both sides xlog(a) = log(4) x = log(4) / log(a) is the point where it will cut/touch the x axis for a > 1

OpenStudy (anonymous):

if a was positive, would the answer be false?

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