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सिद्ध कीजिए कि तलों 7x-4y+7z+16=0, 4x+3...

सिद्ध कीजिए कि तलों `7x-4y+7z+16=0, 4x+3y-2z+3=0` की प्रतिच्छेद-रेखा , तलों `x-3y+4z+6=0, x-y+z+1=0` की प्रतिच्छेद-रेखा के साथ समतलीय हैं ।

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