Question

f(a)=(7/(a-6))-(84/(a^2-36))
evaluate the limit where a approaches 6
f(a)=?

please explain the steps

Answer 1

lim(7(a+6)-84)/(a^2-36)=lim(7a-42)/(a^2-36)=lim7/(a+6)=7/12,
ok ?

Answer 2

I don't think that's right

Answer 3

0/0 ?

Answer 4

limit a -> 6

Answer 5

are u mathtype and word 2003 ?

Answer 6

lim (7/(a-6))-(84/(a^2-36))
=lim((7/(a-6))-(84/((a-6)(a+6)))
=lim ((7(a+6)-84)/((a-6)(a+6)))
=lim ((7a+42-84)/((a-6)(a+6)))
=lim ((7a-42)/((a-6)(a+6)))
=lim(7(a-6)/((a-6)(a+6)))
=lim (7/(a+6))
=7/12

Answer 7

ok