Find the sum of first 22 term of an AP in which d = 7 and 22nd term is 149.
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Tń=a+(ń-1)d
149=a+(22-1)(7)
149=a+21*7
149=a+147
a=2
Sn=(n/2)(a+Tn)
S22=(22/2)(2+149)
=11*151
S22=1661
149=a+(22-1)(7)
149=a+21*7
149=a+147
a=2
Sn=(n/2)(a+Tn)
S22=(22/2)(2+149)
=11*151
S22=1661
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