Solve for exponent variable
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syms x y z a b c Q N P S
Q= x^a
S = solve(Q==(x^4),a)
S-4
% why the answer is not zero and how to make it?
采纳的回答
Ameer Hamza
2020-10-24
You need to specify the assumption that 
.
.syms x y z a b c Q N P S
assume(x, 'positive')
Q = x^a
S = simplify(solve(Q==(x^4),a))
S-4
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