tinh nhanh 133 x 437 + 453 = bao nhieu
tim x ( 7676 x 686 ) x - 698 = 67878
tinh 653276 x 45746587 x 657597 + 57465 x 6765576 = bao nhieu
tinh tong cac so nguyen biet 40<31|x|<47 giup minh na ai giup nhanh se dc tick nhieu
do cac ban
1222222222202220216562814514195386338738 nhan voi 0 bang bao nhieu
TINH NHANH NHA
x/2 du 3 x/3 du du 2 hoi x la bao nhieu biet x < 15 ai lam nhanh minh tich 20 cai
tinh nhanh 1*3+2*4+3*5+4*6+........+97*99+98*100 bang bao nhieu
1. x^10 = 1^x
x^10 = x
(2*x-15)^5 = (2*x-15)^3
2. a co bao nhieu chu so ?
10^20 < a<10^21
3. Cho a = 1+2^2+2^3+..................+2^50
a)Tinh 2a
b)Tinh 2a-a
c)Chung minh a+1 la luy thua cua 2
a, co bao nhieu cap so nguyen ( x,y ) thoa man x + y=1
b. co bao nhieu cap so nguyen ( x,y ) thoa man x.2 + y =1