Biết P = . . . 2 ⏟ 2019   c a n   b a c   h a i = 2 m n " src="https://img-question-vn.ruangguru.com/lWTLNb_A-XOYnumtTUrpCmVWUVObls1qf5mEQvyCjBKVCquEUS6K0K_XBgAatkg918gq4KYDH7QnBFiJ0upvR5TIEclmjDVVXiXrL7pybzhPJtScTCBOoRDRfuhrTQ6u8xD1Ez2X" style="width: 162.67px; height: 52.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="P equals stack stack square root of square root of square root of... square root of 2 end root end root end root with underbrace below with 2019 space c a n space b a c space h a i below equals 2 to the power of m over n end exponent"> ( là phân số tối giản). Tính .

Giải thích

Ta có Do đó . . . 2 ⏟ 2019   c a n   b a c   h a i = 2 2 1 2019 " src="https://img-question-vn.ruangguru.com/AhDX3MA-xURjnd6zLjYFlDe35Zit9qk9eseZhS6UBbkuQw1n8liEWkStMhZLYDh9xa3ClMvt7fe3j-hj5bNoxh5pgJFXmBfzLIhNpFU_kEA_G6yS2XNNIajixUdMVFQC1MNJN6TE" style="width: 153.33px; height: 52.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="stack stack square root of square root of square root of... square root of 2 end root end root end root with underbrace below with 2019 space c a n space b a c space h a i below equals 2 to the power of 2 to the power of 1 over 2019 end exponent end exponent"> Vậy .