यदि (.^nC(r))/(.^nC(r+1))=(1)/(2) और (.^...

यदि `(.^nC_(r))/(.^nC_(r+1))=(1)/(2)` और `(.^nC_(r+1))/(.^nC_(r+2))=(2)/(3),n` और r का मान ज्ञात कीजिए।

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यदि (.^nC(r))/(.^nC(r+1))=(1)/(2) और (.^nC(r+1))/(.^nC(r+2))=(2)/(3),n...
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