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CBSE Class 10 Answered

what is the common differnce of an ap in which a27-a7=84?
Asked by Lukeyluke77 | 05 Nov, 2018, 02:20: PM
answered-by-expert Expert Answer
 
a7  =   a + (7 - 1)d = a + 6d   ...(i)
a27  =   a + (27 - 1)d = a + 26d   ...(ii)

Since, a27-a7=84

a + 26d - a - 6d = 84
d = 4.2  

Answered by Yasmeen Khan | 05 Nov, 2018, 06:33: PM

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