Final answer:
The given expression can be expressed in summation (sigma) notation as ∑(xⁿ/n(n-1)).
Step-by-step explanation:
The given expression:
1 + x + x²/2 + x³/32 + x⁴/4 + ... + xⁿ/n(n-1)
can be expressed in summation (sigma) notation as follows:
∑(xⁿ/n(n-1))
where n ranges from 1 to infinity.
In this notation, the symbol ∑ represents the summation of all terms, x represents the variable, and the expression xⁿ/n(n-1) represents each term in the series. The exponent n indicates the power of x, and n(n-1) represents the denominator of each term.