Tim n thuoc N , biet so n co 30 uoc va khi phan tich thanh thua so nguyen to thi co dang n = 2^x × 3^y biet x + y = 8
tim so tu nhien n, biet rang so n co 30 uoc va khi phan tich thanh thua so nguyen to thi co dang:
n=2n *3y trong do x+y=8
so tu nhien n lon nhat co dung 30 uoc so va khi phan tich thanh thua so nguyen to thi co danh n = 2^x . 3^y trong do y +x =8
Tim so tu nhien a biet rang so a co 12 uoc va khi viet a ve dang tich cac thua so nguyen to thi A=5x.7y
tim so tu nhien n chi co 2 thua so nguyen to biet rang n^2 co 21 uoc so hoi n^3 co bao nhieu uoc so
cho a la 1 hop so, khi phan tich ra thua so nguyen to chi chua hai thua so nguyen to khac nhau la P 1 va P 2. biet a^3 co tat ca 40 uoc. Hoi a ^2 co bao nhieu uoc
tim so tu nhien a biet a=2^x.3^y voi x y thuoc N* va a co 15 uoc
Cho a la mot hop so.biet khi phan tich ra thua so nguyen to thi a chi chua 2 thua so nguyen to la p1 va p2. Biet a mu 3 co tat ca 40 uoc tu nhien.
Hoi a mu 2 co bao nhieu uoc tu nhien.
Ai giai nhanh minh tick.giai ra nhe
cho a la mot hop so ,khi phan tich ra thua so nguyen to chi chua 2 thua so nguyen to khac nhau la p1 va p2.biet a3 co tat ca 40 uoc hoi a2co bao nhieu uoc