Find the binomial expansion of (1+4x)^2 up to and including the term in x^3. State the range of values of x for which the expansion is valid.
Added by Anthony R.
Step 1
The binomial theorem states that (a+b)^n = a^n + (n choose 1)a^(n-1)b + (n choose 2)a^(n-2)b^2 + ... + b^n. Applying this to (1+4x)^2, we get: Show more…
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