7Y = y + 1 solve equations,
7Y = y + 1
7/5y-y=1
2/5y=1
y=5/2=2.5
3 / 3 y + 1-1
(3y+1)/3-1
The squares of natural numbers are arranged in the order from small to large . the number on position 346 is______ .
Because 3 × 1 + 6 × 2 + 22 × 3 < 346 < 3 × 1 + 6 × 2 + 22 × 3 + 68 × 4, and because 346 = 3 × 1 + 6 × 2 + 22 × 3 + 68 × 4 + 7, namely 353-346 = 7, the 346th digit is the thousand digit 9 of 982 = 9604