if a;b>0 then prove that: (((a + b)^6 (a^(15) + b^(15) ) (a^(21) + b^(21) ))/((a^3 + b^3 )^2 (a^5 + b^5 )^3 (a^7 + b^7 )^3 )) ≥ 1


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Question Number 157417 by MathSh last updated on 23/Oct/21

$if a; b > 0 then prove that :$ $\frac{{(a + b)}^{6} (a^{15} + b^{15}) (a^{21} + b^{21})}{{(a^{3} + b^{3})}^{2} {(a^{5} + b^{5})}^{3} {(a^{7} + b^{7})}^{3}} ⩾ 1$
	Answered by upendramajhi last updated on 23/Oct/21


	Commented by Rasheed.Sindhi last updated on 23/Oct/21

	$O r h e h a d b o o k e d s p a c e f o r h i s a n s w e r!$
	Commented by mr W last updated on 23/Oct/21

	$p l e a s e c h e c k y o u r p e n, i t h a s n o i n k$ $m o r e . o r i f y o u a r e u s i n g a n i n v i s i b l e$ $i n k, p l e a s e t e l l u s h o w t o m a k e i t$ $v i s i b l e a g a i n .$
	Commented by Rasheed.Sindhi last updated on 23/Oct/21

	$H e h a s w r i t t e n w i t h w h i t e c h a l k$ $o n w h i t e b o a r d!$
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