A. The positive real number that is one greater than its multiplicative inverse. Q?

Question

The answer is "The positive real number that is one greater than its multiplicative inverse." What is the question?

Answer 1

x - 1 = 1/x
x² - x -1 = 0
this equation can be solved in

x = 1/2 ± √5/4
but when x is +ive
then
x = 1/2 + √5/4
x = 1.618033988749
x ≈1.62
***************
NOTE
we solve the equation ax² + bx +c = 0
with formula
x = (-b ±√(b² -4ac) )/2
**************
this number is called the golden ratio φ

Two quantities are in golden ratio if their sum is to the larger quantity as the larger is to the smaller. Stated mathematically:

(a+b)/a = a/b
where a is the larger and b is the smaller quantity.

This ratio, denoted (φ), is an irrational number with value

φ ≈1.618033989

The first calculation of the golden ratio, was described by Euclid in his Elements (greek: Στοιχεῖα).

The most common other names used for the golden ratio are golden section (Latin: sectio aurea), golden mean (which has another unrelated meaning, see Golden mean (philosophy)), golden number, and phi (referring to the Greek letter φ).[1][2][3] Other names include medial section, divine proportion (Italian: divine proportione), divine section (Latin: sectio divina), golden proportion, golden cut,[4] extreme and mean ratio, and mean of Phidias.[5][6][7]

Since the sixteenth century, shapes proportioned according to the golden ratio have been considered aesthetically pleasing in Western cultures; the golden ratio is still frequently used in art and design. The golden ratio has attracted a large following for its supposed aesthetic, psychological, historical, mystical, natural, and metaphysical properties, in addition to its mathematical properties.

Answer 2

any comment on the number 2?

Answer 3

What is the definition of φ (divine ratio/golden ratio)?

^_^

Answer 4

What is phi? (1.618034..)