find the ap, if 10th is46 and the sum of 5th and 7th terms is 52??
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t10=46
a+9d=46---------eq.1
t5+t7=52
a+6d+a+4d=52
2a+10d=52
Dividing each one by 2,
a+5d=26-----eq.2
Now,
Subtracting eq.2 from eq.1
a+9d=46
- a+5d=26
________
4d=20
therefore, d=5
Substituting value of d in eq. 1
a+9d=46
But d=5,
a+9*5=46
a=1
therefore,
a=1 and d=5
A.P,
a,a+d,a+2d,........
1,1+5,1+2×5,....
1,6,11,.......
Is the A.P.
t10=46
a+9d=46---------eq.1
t5+t7=52
a+6d+a+4d=52
2a+10d=52
Dividing each one by 2,
a+5d=26-----eq.2
Now,
Subtracting eq.2 from eq.1
a+9d=46
- a+5d=26
________
4d=20
therefore, d=5
Substituting value of d in eq. 1
a+9d=46
But d=5,
a+9*5=46
a=1
therefore,
a=1 and d=5
A.P,
a,a+d,a+2d,........
1,1+5,1+2×5,....
1,6,11,.......
Is the A.P.
ahilyaTathod:
ans is 1,6,11
Answered by
1
Here your answer Dear!!
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