This is a True or False question:
Q[sqrt10] belongs to Q[sqrt2, sqrt5].
Does Q[sqrt2, sqrt5] mean, all numbers of the form a+b*sqrt2+c*sqrt5, with a,b, c in Q?
Also, can someone point me to a guide on how to type things like sqrt, integral sign, etc on this forum?
Forum for the GRE subject test in mathematics.
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