a. 1/a^2 <-9 b. 1/a^2 <-3 c. -1/9<1/a^2<1/9 d. 0<1/a^2<1/9 e. 1/9<1/a^2<1/3 please answer and explain
a^2 > 9 1/a^2 < 1/9 a^2 is always positive, and 1/a^2 cannot be zero, (d)
You can ask a new question or answer this question.