Find the 15th term of A-P 10, 14, 18, 22.
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YOUR SOLUTION IS ABOVE
To find the sum of arithmetic progression, we have to know the first term, the number of terms and the common difference between each term. Then use the formula given below:
S = n/2[2a + (n − 1) × d]
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10
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66 ᗯIᒪᒪ ᗷE TᕼE ᗩᑎSᗯEᖇ.
a15 = a + ( n - 1 ) d
= a + 14 ( d )
= 10 + 14 ( 4 )
= 10 + 56
= 66.
ᑭᒪEᗩSE TᕼᗩᑎKS ᗰY ᗩᑎSEᗯEᖇ ....
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