Math Is Fun Forum

ques1-----   if a,b,c are pth ,qth,rth terms of an a.p. and g.p.both prove that
a^b *b^c *c^a=a^c *b^a *c^b

ques2-------from three nuimers in g.p. other three numbersin g.p are subtracted and the remainder are also found to be in g.p.prove that the three sequences  have the same common ratio.

ques3-------the sides of a quadrilatral are 3,4,5,6cms.the sum of a pair of opposites angles is 120degree show that the area of quadrilatral is 16.431 sq cm.                                                                                                                                                                                                                                                                                                                                                                                                                                                   PLEASE HELP IMMEDIATILY AND THANK U IN ADVANCE.