# The five digit number #2a9b1# is a perfect square. What is the value of #a^(b-1)+b^(a-1)#?

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- What are the vertex, focus and directrix of # y=-15+12x-2x^2 #?
- How do you rewrite the following quadratic equation in vertex form: #y=x^2-8x+13#?
- How do you find the axis of symmetry, and the maximum or minimum value of the function #f(x)= x^2+2x-7#?
- How do you solve by factoring # 2x^2+ 7x + 3=0#?
- How do you solve #3x^2 + 17x -6 = 0# by completing the square?

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