if the third and the sixth term of an ap are 7 and 13 respectively find the 10th term
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Answered by
5
Answer:
21
Step-by-step explanation:
anushashree:
explain
pls
sorry, ok so we use formula: an=a+(n-1)d we get value of d as two so we put it in the same equation with 10 as the value of n. we get the answer as 21. im in ninth grade
Answered by
19
let the first term a and the common difference d
a3 =7
a+2d=7......(1)
a6=13
a+5d=13....(2)
a=13-5d......(3)
put the value of a equation 1
13-5d+2d=7
-3d=-6
d=2
a=13-5(2)
a=13-10
a=3
a10=a+9d
=3+9(2)
=21
the 10th term of an ap is 21
a3 =7
a+2d=7......(1)
a6=13
a+5d=13....(2)
a=13-5d......(3)
put the value of a equation 1
13-5d+2d=7
-3d=-6
d=2
a=13-5(2)
a=13-10
a=3
a10=a+9d
=3+9(2)
=21
the 10th term of an ap is 21
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