Practice problem
How many terms are there in the expansion of (a+b)(a2+b2)(a4+b4)⋯(a64+b64)?(a + b)(a^2+b^2)(a^4+b^4)\cdots (a^{64}+b^{64})?(a+b)(a2+b2)(a4+b4)⋯(a64+b64)?
323232
646464
128128128
256256256
Type a concept, like “slope” or “photosynthesis”.