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

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

Akhilesh Singh · Answer

Hi AshtaI 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.

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

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