13 निम्न A.P. में अज्ञात पद ज्ञात कीजिए।
a)2 ( )
26
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Step-by-step explanation:
a1= a=2 and a3=26
an=a+(n-1)d
a3=a+(3-1)d
26=2+2d
26-2=2d
24=2d
d=24
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2
d=12
a2=a+d
a2=2+12 (becoz d=12)
a2=14
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