APPROACH PLEASE

a.the sum of products of ten numbers (both positive &negative; signs)1,2,3,...5 taking two at a time is ?
B.If a ,b ,c are real numbers ,then minimum value of ab+bc+ca?C. If |x| -|y| =13 then which of following can't be value of x-y? options: -19 / -9/-17/none of these

Question

Akhilesh Singh · Accepted Answer

Hi Ashta
I think you have posted 3 questions in the same post. I would request you to post the questions separately to improve their readability. This would help us to answer you better. Hope that helps.

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APPROACH PLEASEa.the sum of products of ten numbers (both positive &negative; signs)1,2,3,...5 taking two at a time is ?B.If a ,b ,c are real numbers ,then minimum value of ab+bc+ca?C. If |x| -|y| =13 then which of following can't be value of x-y? options: -19 / -9/-17/none of these

APPROACH PLEASE

a.the sum of products of ten numbers (both positive &negative; signs)1,2,3,...5 taking two at a time is ?
B.If a ,b ,c are real numbers ,then minimum value of ab+bc+ca?C. If |x| -|y| =13 then which of following can't be value of x-y? options: -19 / -9/-17/none of these