Find the sum of the first 22 terms of an AP in which d = 7 and 22nd term is 149.
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27
Hii
here is ur solution
Given that, d= 7 and a22 = 149 , S22 = ?
an = a + (n-1) d
a22 = a+ (22-1) 7
a22 = a + 21 * 7
149 = a + 147
a = 149 - 147
a = 2
Sn = n/2 ( a + an)
= 22/2 (2+149)
= 11(151)
S22 = 1661
hope it helps you
here is ur solution
Given that, d= 7 and a22 = 149 , S22 = ?
an = a + (n-1) d
a22 = a+ (22-1) 7
a22 = a + 21 * 7
149 = a + 147
a = 149 - 147
a = 2
Sn = n/2 ( a + an)
= 22/2 (2+149)
= 11(151)
S22 = 1661
hope it helps you
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