Tim so tu nhien A biet trong cac dieu kien cua A duoi day chi co hai dieu kien dung, mot dieu kien sai:

a. A+51 la so chinh phuong

b. A tan cung la 1

c. A-38 la so chinh phuong

Tim a \(\in\)N* biet 1!+ 2! + 3!+...+a! la so chinh phuong

Tim n thuoc N sao cho: 1!+2!+3!+.......+n! la so chinh phuong

ai nhanh thi minh tick cho

trinh bay ca loi giai nua nhe

so chinh phuong lon nhat co 3 chu so la:........?

(ai tra loi dung nhanh nhat minh tick cho 2 cai lun)

TIM SO NGUYEN TO CO 3 CHU SO BIET KHI VIET THEO THU TUNGUOC LAI NO LA 1 SO CHINH PHUONG

giup minh voi 

a, 2A co phai la so chinh phuong khong

b, tim so du cua a khi chia cho 13

c, tim so du cua b khi chia cho 31

d, tim x biet ,4b + 5 = 5^x=100

cam on mn da giup minh

biet aabb la so chinh phuong khi do a+b=

a)so sanh E=2018^99-1/2018^100-1 va F=2018^98/2018^99-1

b)Tim so nguyen to ab (a>b>0),biet ab-ba la so chinh phuong

c)Cho abc la so tu nhien co 3 chu so .Tim gia tri lon nhat cua A={abc/a+b+c}+1918

          b,  tim n de [n+10].[n+21]=124689

          c,  tim cac chu so a,b biet aabb la so chinh phuong