show that the square of any positive integer is either of the form 4m or 4m+1 for some integer m
Answers
Answered by
169
let X be any positive integer in the form 4m, 4m+ 1
we know that
a = bq+ r
put b =4
acc. to question
a^2 = (4q + 0) ^2
= (16q^2)
= 4. 4q^2
=4m
where m = 4q^2
2) a^2 = (4q +1)^2
= 16q^2 +1 + 4q
= 4 (4q^2 + q) +1
= 4m + 1
where m = 4q^2 + q
plz mark as brainlist
we know that
a = bq+ r
put b =4
acc. to question
a^2 = (4q + 0) ^2
= (16q^2)
= 4. 4q^2
=4m
where m = 4q^2
2) a^2 = (4q +1)^2
= 16q^2 +1 + 4q
= 4 (4q^2 + q) +1
= 4m + 1
where m = 4q^2 + q
plz mark as brainlist
Answered by
58
let a be any positive integer
then
b=8
0≤r<b
0≤r<4
r=0,1,2, 3
case 1.
r=0
a=bq+r
4q+0
(4q)^2
=> 16q^2
4(4q^2)
= let 2q^2 be m
4m
case 2.
r=1
a=bq+r
(4q+1)^2
(4q)^2+2*4q*1+(1)^2
16q^2+8q+1
4(4q^2+2q)+1.
let 4q^2+2q be. m
4m+1
case 3.
r=2
(4q+2)^2
(4q)^2+2*4q*2+(2)^2
16q^2+16q+4
4(4q^2+4q+1)
let 8q^2+4q+1 be m
4m
case4.
r=3
(4q+3)^2
(4q)^2+2*4q*3+(3)^2
16q^2+24q+9
16q^2+24q+8+1
4(4q^2+6q+1)+1
let 4q^2+6q+1 be m
4m+1
from above it is proved.
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