किसी A.P. के 35 पदों के योग ज्ञात करें यदि इसका दूसरा पद 2 तथा सातवां पद 22 हो।
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Step-by-step explanation:
a+d = 2....eq1
a+6d= 22 .....eq2
from eq 1
a = 2-d...... eq3
put it in eq 2
2-d+6d = 22
5d = 20
d= 4
put d= 4 in eq 3
a = 2-4
a = -2
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