<unk> <unk> <unk> <unk> <unk>  Passage: If a closed-form expression for the solution is not available, the solution may be numerically approximated using computers. Passage: If a closed-form expression for the solution is not available, the solution may be numerically approximated using computers. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️  Question: What can be used to find solution to closed-form expression?<unk>Question: What can be used to find solution to closed-form expression?
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