समांतर श्रेणी 3,5,7............ में 15 पद हैं। अंतिम पद ज्ञात कीजिए।
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Step-by-step explanation:
a= 3
n = 15
d= 2
an = a+(n-1)d
3+(15-1) 2
= 3 + 28
= 31
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