Inflation factor = (1.028)^120 ≈ 13.83
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- Platinum cost = 200 × 2.50 = <<200*2.50=500>>500
- Rhodium cost = 15 × 12.80 = <<15*12.80=192>>192
- Subtotal = 500 + 192 = <<500+192=692>>692
- Present value = 692 / 13.83 ≈ <<692/13.83=49.97>>49.97
- #### 49.97Question: Let $ f(x^2 + 2) = x^4 + 4x^2 + 3 $. Find $ f(x^2 - 2) $.
- Solution: Let us define a function $ f(u) $ such that
